130640724 has 36 divisors (see below), whose sum is σ = 331423456. Its totient is φ = 43389648.

The previous prime is 130640717. The next prime is 130640729. The reversal of 130640724 is 427046031.

130640724 is a `hidden beast` number, since 13 + 0 + 640 + 7 + 2 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130640729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3777 + ... + 16599.

Almost surely, 2^130640724 is an apocalyptic number.

It is an amenable number.

130640724 is an abundant number, since it is smaller than the sum of its proper divisors (200782732).

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

130640724 is a wasteful number, since it uses less digits than its factorization.

130640724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13116 (or 13111 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 130640724 is about 11429.8173213748. The cubic root of 130640724 is about 507.4105890517.

Adding to 130640724 its reverse (427046031), we get a palindrome (557686755).

The spelling of 130640724 in words is "one hundred thirty million, six hundred forty thousand, seven hundred twenty-four".