631672072 has 8 divisors (see below), whose sum is σ = 1184385150. Its totient is φ = 315836032.

The previous prime is 631672061. The next prime is 631672121. The reversal of 631672072 is 270276136.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 492573636 + 139098436 = 22194^2 + 11794^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39479497 + ... + 39479512.

Almost surely, 2^631672072 is an apocalyptic number.

It is an amenable number.

631672072 is a deficient number, since it is larger than the sum of its proper divisors (552713078).

631672072 is a wasteful number, since it uses less digits than its factorization.

631672072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78959015 (or 78959011 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 631672072 is about 25133.0871959654. The cubic root of 631672072 is about 858.0196328571.

The spelling of 631672072 in words is "six hundred thirty-one million, six hundred seventy-two thousand, seventy-two".