320040 has 96 divisors (see below), whose sum is σ = 1198080. Its totient is φ = 72576.

The previous prime is 320039. The next prime is 320041. The reversal of 320040 is 40023.

It is an interprime number because it is at equal distance from previous prime (320039) and next prime (320041).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2457 + ... + 2583.

It is an arithmetic number, because the mean of its divisors is an integer number (12480).

2³²⁰⁰⁴⁰ is an apocalyptic number.

320040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (599040).

320040 is an abundant number, since it is smaller than the sum of its proper divisors (878040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

320040 is a wasteful number, since it uses less digits than its factorization.

320040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151 (or 144 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 9.

The square root of 320040 is about 565.7207791835. The cubic root of 320040 is about 68.4018877082.

Adding to 320040 its reverse (40023), we get a palindrome (360063).

It can be divided in two parts, 3200 and 40, that added together give a triangular number (3240 = T₈₀).

The spelling of 320040 in words is "three hundred twenty thousand, forty", and thus it is an iban number.