131638884 has 48 divisors (see below), whose sum is σ = 331575552. Its totient is φ = 40407552.

The previous prime is 131638879. The next prime is 131638937. The reversal of 131638884 is 488836131.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91797 + ... + 93219.

It is an arithmetic number, because the mean of its divisors is an integer number (6907824).

Almost surely, 2^131638884 is an apocalyptic number.

It is an amenable number.

131638884 is an abundant number, since it is smaller than the sum of its proper divisors (199936668).

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

131638884 is a wasteful number, since it uses less digits than its factorization.

131638884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2036 (or 2034 counting only the distinct ones).

The product of its digits is 110592, while the sum is 42.

The square root of 131638884 is about 11473.3989732773. The cubic root of 131638884 is about 508.6996013237.

It can be divided in two parts, 131 and 638884, that added together give a triangular number (639015 = T₁₁₃₀).

The spelling of 131638884 in words is "one hundred thirty-one million, six hundred thirty-eight thousand, eight hundred eighty-four".