31407730896872 has 32 divisors (see below), whose sum is σ = 64246041241920. Its totient is φ = 14275584579840.

The previous prime is 31407730896853. The next prime is 31407730896923. The reversal of 31407730896872 is 27869803770413.

It is a junction number, because it is equal to n+sod(n) for n = 31407730896799 and 31407730896808.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6282833 + ... + 10113824.

It is an arithmetic number, because the mean of its divisors is an integer number (2007688788810).

Almost surely, 2^{31407730896872} is an apocalyptic number.

It is an amenable number.

31407730896872 is an abundant number, since it is smaller than the sum of its proper divisors (32838310345048).

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

31407730896872 is a wasteful number, since it uses less digits than its factorization.

31407730896872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16418441 (or 16418437 counting only the distinct ones).

The product of its (nonzero) digits is 85349376, while the sum is 65.

The spelling of 31407730896872 in words is "thirty-one trillion, four hundred seven billion, seven hundred thirty million, eight hundred ninety-six thousand, eight hundred seventy-two".