31428904864 has 48 divisors (see below), whose sum is σ = 70912195200. Its totient is φ = 13431976704.

The previous prime is 31428904769. The next prime is 31428904867. The reversal of 31428904864 is 46840982413.

It is not an unprimeable number, because it can be changed into a prime (31428904867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114999 + ... + 275830.

It is an arithmetic number, because the mean of its divisors is an integer number (1477337400).

Almost surely, 2^31428904864 is an apocalyptic number.

It is an amenable number.

31428904864 is an abundant number, since it is smaller than the sum of its proper divisors (39483290336).

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

31428904864 is a wasteful number, since it uses less digits than its factorization.

31428904864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391205 (or 391197 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 49.

The spelling of 31428904864 in words is "thirty-one billion, four hundred twenty-eight million, nine hundred four thousand, eight hundred sixty-four".