8131988 has 12 divisors (see below), whose sum is σ = 14562240. Its totient is φ = 3971352.

The previous prime is 8131969. The next prime is 8131993. The reversal of 8131988 is 8891318.

It is a super-2 number, since 2×8131988² = 132258457664288, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) 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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23468 + ... + 23811.

It is an arithmetic number, because the mean of its divisors is an integer number (1213520).

Almost surely, 2^8131988 is an apocalyptic number.

It is an amenable number.

8131988 is a deficient number, since it is larger than the sum of its proper divisors (6430252).

8131988 is a wasteful number, since it uses less digits than its factorization.

8131988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47326 (or 47324 counting only the distinct ones).

The product of its digits is 13824, while the sum is 38.

The square root of 8131988 is about 2851.6640755881. The cubic root of 8131988 is about 201.0939059406.

It can be divided in two parts, 8131 and 988, that added together give a palindrome (9119).

The spelling of 8131988 in words is "eight million, one hundred thirty-one thousand, nine hundred eighty-eight".