631504 has 20 divisors (see below), whose sum is σ = 1266660. Its totient is φ = 304640.

The previous prime is 631487. The next prime is 631507. The reversal of 631504 is 405136.

It can be written as a sum of positive squares in 2 ways, for example, as 211600 + 419904 = 460^2 + 648^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217 + ... + 1144.

It is an arithmetic number, because the mean of its divisors is an integer number (63333).

2⁶³¹⁵⁰⁴ is an apocalyptic number.

It is an amenable number.

631504 is an abundant number, since it is smaller than the sum of its proper divisors (635156).

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

631504 is a wasteful number, since it uses less digits than its factorization.

631504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398 (or 1392 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 631504 is about 794.6722594881. The cubic root of 631504 is about 85.7943526982.

The spelling of 631504 in words is "six hundred thirty-one thousand, five hundred four".