31885423120 has 40 divisors (see below), whose sum is σ = 74222124480. Its totient is φ = 12738940800.

The previous prime is 31885423117. The next prime is 31885423133. The reversal of 31885423120 is 2132458813.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 31885423120.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170406 + ... + 304645.

It is an arithmetic number, because the mean of its divisors is an integer number (1855553112).

Almost surely, 2^31885423120 is an apocalyptic number.

It is an amenable number.

31885423120 is an abundant number, since it is smaller than the sum of its proper divisors (42336701360).

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

31885423120 is a wasteful number, since it uses less digits than its factorization.

31885423120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475903 (or 475897 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 37.

The spelling of 31885423120 in words is "thirty-one billion, eight hundred eighty-five million, four hundred twenty-three thousand, one hundred twenty".