31447907964 has 96 divisors (see below), whose sum is σ = 91812833280. Its totient is φ = 9222249600.

The previous prime is 31447907923. The next prime is 31447907977. The reversal of 31447907964 is 46970974413.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 31447907964.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 390129 + ... + 463784.

It is an arithmetic number, because the mean of its divisors is an integer number (956383680).

Almost surely, 2^31447907964 is an apocalyptic number.

It is an amenable number.

31447907964 is an abundant number, since it is smaller than the sum of its proper divisors (60364925316).

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

31447907964 is a wasteful number, since it uses less digits than its factorization.

31447907964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 853968 (or 853960 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 54.

The spelling of 31447907964 in words is "thirty-one billion, four hundred forty-seven million, nine hundred seven thousand, nine hundred sixty-four".