31113984 has 144 divisors (see below), whose sum is σ = 94187520. Its totient is φ = 9031680.

The previous prime is 31113967. The next prime is 31114007. The reversal of 31113984 is 48931113.

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, 244929 + ... + 245055.

It is an arithmetic number, because the mean of its divisors is an integer number (654080).

Almost surely, 2^31113984 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 31113984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47093760).

31113984 is an abundant number, since it is smaller than the sum of its proper divisors (63073536).

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

31113984 is a wasteful number, since it uses less digits than its factorization.

31113984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186 (or 172 counting only the distinct ones).

The product of its digits is 2592, while the sum is 30.

The square root of 31113984 is about 5577.9910362065. The cubic root of 31113984 is about 314.5226127307.

The spelling of 31113984 in words is "thirty-one million, one hundred thirteen thousand, nine hundred eighty-four".