131885406 has 12 divisors (see below), whose sum is σ = 285751752. Its totient is φ = 43961796.

The previous prime is 131885387. The next prime is 131885437. The reversal of 131885406 is 604588131.

131885406 is a `hidden beast` number, since 1 + 31 + 88 + 540 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3663466 + ... + 3663501.

It is an arithmetic number, because the mean of its divisors is an integer number (23812646).

Almost surely, 2^131885406 is an apocalyptic number.

131885406 is an abundant number, since it is smaller than the sum of its proper divisors (153866346).

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

131885406 is a wasteful number, since it uses less digits than its factorization.

131885406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7326975 (or 7326972 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 131885406 is about 11484.1371465165. The cubic root of 131885406 is about 509.0169529492.

The spelling of 131885406 in words is "one hundred thirty-one million, eight hundred eighty-five thousand, four hundred six".