120640680 has 48 divisors (see below), whose sum is σ = 392083380. Its totient is φ = 32170752.

The previous prime is 120640679. The next prime is 120640691. The reversal of 120640680 is 86046021.

120640680 is a `hidden beast` number, since 12 + 0 + 640 + 6 + 8 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 111386916 + 9253764 = 10554^2 + 3042^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 167197 + ... + 167916.

Almost surely, 2^120640680 is an apocalyptic number.

120640680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120640680 is an abundant number, since it is smaller than the sum of its proper divisors (271442700).

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

120640680 is a wasteful number, since it uses less digits than its factorization.

120640680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335130 (or 335123 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 120640680 is about 10983.6551293274. The cubic root of 120640680 is about 494.1186643637.

The spelling of 120640680 in words is "one hundred twenty million, six hundred forty thousand, six hundred eighty".