131707840 has 224 divisors, whose sum is σ = 379219968. Its totient is φ = 43008000.

The previous prime is 131707837. The next prime is 131707847. The reversal of 131707840 is 48707131.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131707847) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1855005 + ... + 1855075.

Almost surely, 2^131707840 is an apocalyptic number.

131707840 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 131707840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189609984).

131707840 is an abundant number, since it is smaller than the sum of its proper divisors (247512128).

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

131707840 is a wasteful number, since it uses less digits than its factorization.

131707840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 131707840 is about 11476.4036178587. The cubic root of 131707840 is about 508.7884093453.

The spelling of 131707840 in words is "one hundred thirty-one million, seven hundred seven thousand, eight hundred forty".