131886540 has 36 divisors (see below), whose sum is σ = 400056384. Its totient is φ = 35169696.

The previous prime is 131886533. The next prime is 131886553. The reversal of 131886540 is 45688131.

131886540 is a `hidden beast` number, since 1 + 31 + 8 + 86 + 540 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 131886495 and 131886504.

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 11 ways as a sum of consecutive naturals, for example, 366172 + ... + 366531.

Almost surely, 2^131886540 is an apocalyptic number.

131886540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131886540 is an abundant number, since it is smaller than the sum of its proper divisors (268169844).

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

131886540 is a wasteful number, since it uses less digits than its factorization.

131886540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732718 (or 732713 counting only the distinct ones).

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

The square root of 131886540 is about 11484.1865188615. The cubic root of 131886540 is about 509.0184118511.

The spelling of 131886540 in words is "one hundred thirty-one million, eight hundred eighty-six thousand, five hundred forty".