31118868 has 36 divisors (see below), whose sum is σ = 85813728. Its totient is φ = 9429840.

The previous prime is 31118863. The next prime is 31118869. The reversal of 31118868 is 86881113.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31118863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38896 + ... + 39687.

Almost surely, 2^31118868 is an apocalyptic number.

It is an amenable number.

31118868 is an abundant number, since it is smaller than the sum of its proper divisors (54694860).

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

31118868 is a wasteful number, since it uses less digits than its factorization.

31118868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78604 (or 78599 counting only the distinct ones).

The product of its digits is 9216, while the sum is 36.

The square root of 31118868 is about 5578.4288110542. The cubic root of 31118868 is about 314.5390688690.

The spelling of 31118868 in words is "thirty-one million, one hundred eighteen thousand, eight hundred sixty-eight".