76656840 has 64 divisors (see below), whose sum is σ = 247665600. Its totient is φ = 18868992.

The previous prime is 76656829. The next prime is 76656847. The reversal of 76656840 is 4865667.

It is a happy number.

It is a super-2 number, since 2×76656840² = 11752542237571200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 76656792 and 76656801.

It is not an unprimeable number, because it can be changed into a prime (76656847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23010 + ... + 26129.

It is an arithmetic number, because the mean of its divisors is an integer number (3869775).

Almost surely, 2^76656840 is an apocalyptic number.

It is an amenable number.

76656840 is an abundant number, since it is smaller than the sum of its proper divisors (171008760).

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

76656840 is a wasteful number, since it uses less digits than its factorization.

76656840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49166 (or 49162 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 76656840 is about 8755.3891975171. The cubic root of 76656840 is about 424.7991484621.

The spelling of 76656840 in words is "seventy-six million, six hundred fifty-six thousand, eight hundred forty".