634715972 has 12 divisors (see below), whose sum is σ = 1211730576. Its totient is φ = 288507240.

The previous prime is 634715971. The next prime is 634715987. The reversal of 634715972 is 279517436.

It is a super-2 number, since 2×634715972² = 805728730223809568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 14425363 = 634715972 / (6 + 3 + 4 + 7 + 1 + 5 + 9 + 7 + 2).

It is not an unprimeable number, because it can be changed into a prime (634715971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7212638 + ... + 7212725.

It is an arithmetic number, because the mean of its divisors is an integer number (100977548).

Almost surely, 2^634715972 is an apocalyptic number.

It is an amenable number.

634715972 is a deficient number, since it is larger than the sum of its proper divisors (577014604).

634715972 is a wasteful number, since it uses less digits than its factorization.

634715972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14425378 (or 14425376 counting only the distinct ones).

The product of its digits is 317520, while the sum is 44.

The square root of 634715972 is about 25193.5700526940. The cubic root of 634715972 is about 859.3956327071.

The spelling of 634715972 in words is "six hundred thirty-four million, seven hundred fifteen thousand, nine hundred seventy-two".