31808887396 has 24 divisors (see below), whose sum is σ = 65397294144. Its totient is φ = 13346386080.

The previous prime is 31808887393. The next prime is 31808887403. The reversal of 31808887396 is 69378880813.

It is not an unprimeable number, because it can be changed into a prime (31808887393) 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, 27804400 + ... + 27805543.

It is an arithmetic number, because the mean of its divisors is an integer number (2724887256).

Almost surely, 2^31808887396 is an apocalyptic number.

It is an amenable number.

31808887396 is an abundant number, since it is smaller than the sum of its proper divisors (33588406748).

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

31808887396 is a wasteful number, since it uses less digits than its factorization.

31808887396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55609971 (or 55609969 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 61.

The spelling of 31808887396 in words is "thirty-one billion, eight hundred eight million, eight hundred eighty-seven thousand, three hundred ninety-six".