2311988 has 12 divisors (see below), whose sum is σ = 4624032. Its totient is φ = 990840.

The previous prime is 2311957. The next prime is 2311993. The reversal of 2311988 is 8891132.

2311988 is an admirable number.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41258 + ... + 41313.

It is an arithmetic number, because the mean of its divisors is an integer number (385336).

2^2311988 is an apocalyptic number.

2311988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2311988 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2311988 is a wasteful number, since it uses less digits than its factorization.

2311988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82582 (or 82580 counting only the distinct ones).

The product of its digits is 3456, while the sum is 32.

The square root of 2311988 is about 1520.5222786924. The cubic root of 2311988 is about 132.2295515975.

The spelling of 2311988 in words is "two million, three hundred eleven thousand, nine hundred eighty-eight".