31086872240 has 40 divisors (see below), whose sum is σ = 72301250400. Its totient is φ = 12430573056.

The previous prime is 31086872239. The next prime is 31086872263. The reversal of 31086872240 is 4227868013.

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

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 180197 + ... + 307643.

It is an arithmetic number, because the mean of its divisors is an integer number (1807531260).

Almost surely, 2^31086872240 is an apocalyptic number.

It is an amenable number.

31086872240 is an abundant number, since it is smaller than the sum of its proper divisors (41214378160).

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

31086872240 is a wasteful number, since it uses less digits than its factorization.

31086872240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130509 (or 130503 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 41.

The spelling of 31086872240 in words is "thirty-one billion, eighty-six million, eight hundred seventy-two thousand, two hundred forty".