77976168 has 32 divisors (see below), whose sum is σ = 200211360. Its totient is φ = 25289280.

The previous prime is 77976167. The next prime is 77976181. The reversal of 77976168 is 86167977.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 77976168.

It is not an unprimeable number, because it can be changed into a prime (77976167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43018 + ... + 44793.

It is an arithmetic number, because the mean of its divisors is an integer number (6256605).

Almost surely, 2^77976168 is an apocalyptic number.

It is an amenable number.

77976168 is an abundant number, since it is smaller than the sum of its proper divisors (122235192).

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

77976168 is a wasteful number, since it uses less digits than its factorization.

77976168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87857 (or 87853 counting only the distinct ones).

The product of its digits is 889056, while the sum is 51.

The square root of 77976168 is about 8830.4115419385. The cubic root of 77976168 is about 427.2223483518. Note that the first 3 decimals are identical.

The spelling of 77976168 in words is "seventy-seven million, nine hundred seventy-six thousand, one hundred sixty-eight".