402504 has 32 divisors (see below), whose sum is σ = 1040640. Its totient is φ = 129600.

The previous prime is 402503. The next prime is 402511. The reversal of 402504 is 405204.

It is a plaindrome in base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 402504.

It is not an unprimeable number, because it can be changed into a prime (402503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 474 + ... + 1014.

It is an arithmetic number, because the mean of its divisors is an integer number (32520).

2⁴⁰²⁵⁰⁴ 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 402504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (520320).

402504 is an abundant number, since it is smaller than the sum of its proper divisors (638136).

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

402504 is a wasteful number, since it uses less digits than its factorization.

402504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581 (or 577 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 402504 is about 634.4320294563. The cubic root of 402504 is about 73.8340571799.

Adding to 402504 its reverse (405204), we get a palindrome (807708).

The spelling of 402504 in words is "four hundred two thousand, five hundred four".