131378860 has 24 divisors (see below), whose sum is σ = 283353840. Its totient is φ = 51130944.

The previous prime is 131378843. The next prime is 131378867. The reversal of 131378860 is 68873131.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (131378867) 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, 88030 + ... + 89509.

It is an arithmetic number, because the mean of its divisors is an integer number (11806410).

Almost surely, 2^131378860 is an apocalyptic number.

131378860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131378860 is an abundant number, since it is smaller than the sum of its proper divisors (151974980).

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

131378860 is a wasteful number, since it uses less digits than its factorization.

131378860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177585 (or 177583 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 131378860 is about 11462.0617691583. The cubic root of 131378860 is about 508.3644387189.

The spelling of 131378860 in words is "one hundred thirty-one million, three hundred seventy-eight thousand, eight hundred sixty".