31712808990 has 32 divisors (see below), whose sum is σ = 80116571520. Its totient is φ = 8011656864.

The previous prime is 31712808989. The next prime is 31712809021. The reversal of 31712808990 is 9980821713.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27817684 + ... + 27818823.

It is an arithmetic number, because the mean of its divisors is an integer number (2503642860).

Almost surely, 2^31712808990 is an apocalyptic number.

31712808990 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31712808990 is an abundant number, since it is smaller than the sum of its proper divisors (48403762530).

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

31712808990 is a wasteful number, since it uses less digits than its factorization.

31712808990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55636536.

The product of its (nonzero) digits is 217728, while the sum is 48.

The spelling of 31712808990 in words is "thirty-one billion, seven hundred twelve million, eight hundred eight thousand, nine hundred ninety".