8638131 has 16 divisors (see below), whose sum is σ = 12038400. Its totient is φ = 5503968.

The previous prime is 8638121. The next prime is 8638139. The reversal of 8638131 is 1318368.

It is not a de Polignac number, because 8638131 - 2⁶ = 8638067 is a prime.

It is a super-2 number, since 2×8638131² = 149234614346322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8638139) 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 15 ways as a sum of consecutive naturals, for example, 5890 + ... + 7208.

It is an arithmetic number, because the mean of its divisors is an integer number (752400).

Almost surely, 2^8638131 is an apocalyptic number.

8638131 is a deficient number, since it is larger than the sum of its proper divisors (3400269).

8638131 is a wasteful number, since it uses less digits than its factorization.

8638131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1418.

The product of its digits is 3456, while the sum is 30.

The square root of 8638131 is about 2939.0697507885. The cubic root of 8638131 is about 205.1823164923.

The spelling of 8638131 in words is "eight million, six hundred thirty-eight thousand, one hundred thirty-one".