131709380 has 48 divisors (see below), whose sum is σ = 305411904. Its totient is φ = 47310720.

The previous prime is 131709371. The next prime is 131709397. The reversal of 131709380 is 83907131.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14654 + ... + 21866.

It is an arithmetic number, because the mean of its divisors is an integer number (6362748).

Almost surely, 2^131709380 is an apocalyptic number.

131709380 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 131709380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152705952).

131709380 is an abundant number, since it is smaller than the sum of its proper divisors (173702524).

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

131709380 is a wasteful number, since it uses less digits than its factorization.

131709380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7316 (or 7314 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 131709380 is about 11476.4707118521. The cubic root of 131709380 is about 508.7903923482.

The spelling of 131709380 in words is "one hundred thirty-one million, seven hundred nine thousand, three hundred eighty".