404340 has 48 divisors (see below), whose sum is σ = 1185408. Its totient is φ = 102784.

The previous prime is 404323. The next prime is 404357. The reversal of 404340 is 43404.

404340 = T₁₉₁ + T₁₉₂ + ... + T₂₁₀.

404340 is nontrivially palindromic in base 9.

It is an interprime number because it is at equal distance from previous prime (404323) and next prime (404357).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1234 + ... + 1526.

It is an arithmetic number, because the mean of its divisors is an integer number (24696).

2⁴⁰⁴³⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 404340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (592704).

404340 is an abundant number, since it is smaller than the sum of its proper divisors (781068).

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

404340 is a wasteful number, since it uses less digits than its factorization.

404340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328 (or 326 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 404340 is about 635.8773466636. The cubic root of 404340 is about 73.9461502558.

Adding to 404340 its reverse (43404), we get a palindrome (447744).

The spelling of 404340 in words is "four hundred four thousand, three hundred forty", and thus it is an iban number.