131790140 has 24 divisors (see below), whose sum is σ = 277070640. Its totient is φ = 52656768.

The previous prime is 131790133. The next prime is 131790143. The reversal of 131790140 is 41097131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131790143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17471 + ... + 23849.

It is an arithmetic number, because the mean of its divisors is an integer number (11544610).

Almost surely, 2^131790140 is an apocalyptic number.

131790140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131790140 is an abundant number, since it is smaller than the sum of its proper divisors (145280500).

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

131790140 is a wasteful number, since it uses less digits than its factorization.

131790140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7421 (or 7419 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 131790140 is about 11479.9886759526. The cubic root of 131790140 is about 508.8943624593.

The spelling of 131790140 in words is "one hundred thirty-one million, seven hundred ninety thousand, one hundred forty".