127640520 has 96 divisors (see below), whose sum is σ = 474102720. Its totient is φ = 29174400.

The previous prime is 127640519. The next prime is 127640533. The reversal of 127640520 is 25046721.

127640520 is a `hidden beast` number, since 12 + 7 + 640 + 5 + 2 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22806 + ... + 27845.

It is an arithmetic number, because the mean of its divisors is an integer number (4938570).

Almost surely, 2^127640520 is an apocalyptic number.

127640520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

127640520 is an abundant number, since it is smaller than the sum of its proper divisors (346462200).

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

127640520 is a wasteful number, since it uses less digits than its factorization.

127640520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50675 (or 50668 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 127640520 is about 11297.8104073311. The cubic root of 127640520 is about 503.4961896688.

The spelling of 127640520 in words is "one hundred twenty-seven million, six hundred forty thousand, five hundred twenty".