31980387432 has 192 divisors, whose sum is σ = 94619197440. Its totient is φ = 8979465600.

The previous prime is 31980387389. The next prime is 31980387473. The reversal of 31980387432 is 23478308913.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 50681757 + ... + 50682387.

It is an arithmetic number, because the mean of its divisors is an integer number (492808320).

Almost surely, 2^31980387432 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 31980387432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47309598720).

31980387432 is an abundant number, since it is smaller than the sum of its proper divisors (62638810008).

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

31980387432 is a wasteful number, since it uses less digits than its factorization.

31980387432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332 (or 1321 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 48.

The spelling of 31980387432 in words is "thirty-one billion, nine hundred eighty million, three hundred eighty-seven thousand, four hundred thirty-two".