76128725 has 24 divisors (see below), whose sum is σ = 99889440. Its totient is φ = 57395520.

The previous prime is 76128697. The next prime is 76128727. The reversal of 76128725 is 52782167.

It is not a de Polignac number, because 76128725 - 2⁸ = 76128469 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76128727) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 138902 + ... + 139448.

It is an arithmetic number, because the mean of its divisors is an integer number (4162060).

Almost surely, 2^76128725 is an apocalyptic number.

It is an amenable number.

76128725 is a deficient number, since it is larger than the sum of its proper divisors (23760715).

76128725 is a wasteful number, since it uses less digits than its factorization.

76128725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869 (or 864 counting only the distinct ones).

The product of its digits is 47040, while the sum is 38.

The square root of 76128725 is about 8725.1776486213. The cubic root of 76128725 is about 423.8213710735.

The spelling of 76128725 in words is "seventy-six million, one hundred twenty-eight thousand, seven hundred twenty-five".