31860632628 has 72 divisors (see below), whose sum is σ = 87883548480. Its totient is φ = 9651941760.

The previous prime is 31860632627. The next prime is 31860632659. The reversal of 31860632628 is 82623606813.

It is a happy number.

31860632628 is a `hidden beast` number, since 3 + 1 + 8 + 6 + 0 + 632 + 6 + 2 + 8 = 666.

It is a super-2 number, since 2×31860632628² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31860632627) 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 23 ways as a sum of consecutive naturals, for example, 1660393 + ... + 1679471.

It is an arithmetic number, because the mean of its divisors is an integer number (1220604840).

Almost surely, 2^31860632628 is an apocalyptic number.

It is an amenable number.

31860632628 is an abundant number, since it is smaller than the sum of its proper divisors (56022915852).

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

31860632628 is a wasteful number, since it uses less digits than its factorization.

31860632628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23317 (or 23312 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The spelling of 31860632628 in words is "thirty-one billion, eight hundred sixty million, six hundred thirty-two thousand, six hundred twenty-eight".