625404 has 48 divisors (see below), whose sum is σ = 1662080. Its totient is φ = 181440.

The previous prime is 625397. The next prime is 625409. The reversal of 625404 is 404526.

625404 = 20² + 21² + ... + 123².

It is a happy number.

It is a super-2 number, since 2×625404² = 782260326432, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 625404.

It is not an unprimeable number, because it can be changed into a prime (625409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2859 + ... + 3069.

2⁶²⁵⁴⁰⁴ 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 625404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (831040).

625404 is an abundant number, since it is smaller than the sum of its proper divisors (1036676).

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

625404 is a wasteful number, since it uses less digits than its factorization.

625404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250 (or 248 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 625404 is about 790.8248857996. The cubic root of 625404 is about 85.5172155068.

The spelling of 625404 in words is "six hundred twenty-five thousand, four hundred four".