3111320988 has 18 divisors (see below), whose sum is σ = 7864728144. Its totient is φ = 1037106984.

The previous prime is 3111320987. The next prime is 3111321013. The reversal of 3111320988 is 8890231113.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×3111320988² = 19360636580738592288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 86425583 = 3111320988 / (3 + 1 + 1 + 1 + 3 + 2 + 0 + 9 + 8 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3111320987) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43212756 + ... + 43212827.

Almost surely, 2^3111320988 is an apocalyptic number.

It is an amenable number.

3111320988 is an abundant number, since it is smaller than the sum of its proper divisors (4753407156).

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

3111320988 is a wasteful number, since it uses less digits than its factorization.

3111320988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86425593 (or 86425588 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 3111320988 is about 55779.2164520084. The cubic root of 3111320988 is about 1459.8725396954.

The spelling of 3111320988 in words is "three billion, one hundred eleven million, three hundred twenty thousand, nine hundred eighty-eight".