131390040 has 64 divisors (see below), whose sum is σ = 396511200. Its totient is φ = 34829312.

The previous prime is 131390033. The next prime is 131390041. The reversal of 131390040 is 40093131.

It is a super-2 number, since 2×131390040² = 34526685222403200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131389989 and 131390016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131390041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17596 + ... + 23924.

Almost surely, 2^131390040 is an apocalyptic number.

131390040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131390040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198255600).

131390040 is an abundant number, since it is smaller than the sum of its proper divisors (265121160).

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

131390040 is a wasteful number, since it uses less digits than its factorization.

131390040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6516 (or 6512 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 131390040 is about 11462.5494546370. The cubic root of 131390040 is about 508.3788584746.

The spelling of 131390040 in words is "one hundred thirty-one million, three hundred ninety thousand, forty".