31117960 has 32 divisors (see below), whose sum is σ = 70810200. Its totient is φ = 12305920.

The previous prime is 31117927. The next prime is 31117963. The reversal of 31117960 is 6971113.

It can be written as a sum of positive squares in 4 ways, for example, as 15069924 + 16048036 = 3882^2 + 4006^2 .

It is not an unprimeable number, because it can be changed into a prime (31117963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 811 + ... + 7930.

Almost surely, 2^31117960 is an apocalyptic number.

It is an amenable number.

31117960 is an abundant number, since it is smaller than the sum of its proper divisors (39692240).

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

31117960 is a wasteful number, since it uses less digits than its factorization.

31117960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8841 (or 8837 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 31117960 is about 5578.3474255374. The cubic root of 31117960 is about 314.5360095862.

The spelling of 31117960 in words is "thirty-one million, one hundred seventeen thousand, nine hundred sixty".