31799439232 has 128 divisors (see below), whose sum is σ = 70384308480. Its totient is φ = 14189260800.

The previous prime is 31799439229. The next prime is 31799439257. The reversal of 31799439232 is 23293499713.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×31799439232² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31799439232.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49148733 + ... + 49149379.

It is an arithmetic number, because the mean of its divisors is an integer number (549877410).

Almost surely, 2^31799439232 is an apocalyptic number.

31799439232 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31799439232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35192154240).

31799439232 is an abundant number, since it is smaller than the sum of its proper divisors (38584869248).

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

31799439232 is a wasteful number, since it uses less digits than its factorization.

31799439232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1260 (or 1248 counting only the distinct ones).

The product of its digits is 2204496, while the sum is 52.

The spelling of 31799439232 in words is "thirty-one billion, seven hundred ninety-nine million, four hundred thirty-nine thousand, two hundred thirty-two".