631504368 has 120 divisors (see below), whose sum is σ = 2029572480. Its totient is φ = 181284480.

The previous prime is 631504343. The next prime is 631504373. The reversal of 631504368 is 863405136.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19605 + ... + 40587.

It is an arithmetic number, because the mean of its divisors is an integer number (16913104).

Almost surely, 2^631504368 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 631504368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1014786240).

631504368 is an abundant number, since it is smaller than the sum of its proper divisors (1398068112).

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

631504368 is a wasteful number, since it uses less digits than its factorization.

631504368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21027 (or 21018 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 631504368 is about 25129.7506553487. The cubic root of 631504368 is about 857.9436936333.

The spelling of 631504368 in words is "six hundred thirty-one million, five hundred four thousand, three hundred sixty-eight".