31970930688 has 416 divisors, whose sum is σ = 99298510080. Its totient is φ = 10283728896.

The previous prime is 31970930687. The next prime is 31970930753. The reversal of 31970930688 is 88603907913.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (31970930687) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 385191895 + ... + 385191977.

Almost surely, 2^31970930688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31970930688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49649255040).

31970930688 is an abundant number, since it is smaller than the sum of its proper divisors (67327579392).

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

31970930688 is an frugal number, since it uses more digits than its factorization.

31970930688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171 (or 131 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The spelling of 31970930688 in words is "thirty-one billion, nine hundred seventy million, nine hundred thirty thousand, six hundred eighty-eight".