453440 has 56 divisors (see below), whose sum is σ = 1173480. Its totient is φ = 165888.

The previous prime is 453421. The next prime is 453451. The reversal of 453440 is 44354.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 23104 + 430336 = 152^2 + 656^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4106 + ... + 4214.

It is an arithmetic number, because the mean of its divisors is an integer number (20955).

2⁴⁵³⁴⁴⁰ is an apocalyptic number.

453440 is a gapful number since it is divisible by the number (40) 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 453440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (586740).

453440 is an abundant number, since it is smaller than the sum of its proper divisors (720040).

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

453440 is a wasteful number, since it uses less digits than its factorization.

453440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139 (or 129 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 453440 is about 673.3795363686. The cubic root of 453440 is about 76.8257147687.

Adding to 453440 its reverse (44354), we get a palindrome (497794).

The spelling of 453440 in words is "four hundred fifty-three thousand, four hundred forty".