631872732 has 12 divisors (see below), whose sum is σ = 1474369736. Its totient is φ = 210624240.

The previous prime is 631872701. The next prime is 631872737. The reversal of 631872732 is 237278136.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631872737) 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, 26328019 + ... + 26328042.

Almost surely, 2^631872732 is an apocalyptic number.

It is an amenable number.

631872732 is an abundant number, since it is smaller than the sum of its proper divisors (842497004).

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

631872732 is a wasteful number, since it uses less digits than its factorization.

631872732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52656068 (or 52656066 counting only the distinct ones).

The product of its digits is 84672, while the sum is 39.

The square root of 631872732 is about 25137.0788278988. The cubic root of 631872732 is about 858.1104774581.

The spelling of 631872732 in words is "six hundred thirty-one million, eight hundred seventy-two thousand, seven hundred thirty-two".