76831728 has 40 divisors (see below), whose sum is σ = 198798288. Its totient is φ = 25569792.

The previous prime is 76831723. The next prime is 76831739. The reversal of 76831728 is 82713867.

It is a super-2 number, since 2×76831728² = 11806228854931968, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 76831728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76831723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52900 + ... + 54332.

Almost surely, 2^76831728 is an apocalyptic number.

It is an amenable number.

76831728 is an abundant number, since it is smaller than the sum of its proper divisors (121966560).

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

76831728 is a wasteful number, since it uses less digits than its factorization.

76831728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2561 (or 2555 counting only the distinct ones).

The product of its digits is 112896, while the sum is 42.

The square root of 76831728 is about 8765.3709562117. The cubic root of 76831728 is about 425.1219543904.

The spelling of 76831728 in words is "seventy-six million, eight hundred thirty-one thousand, seven hundred twenty-eight".