77407976 has 16 divisors (see below), whose sum is σ = 152779200. Its totient is φ = 36666864.

The previous prime is 77407951. The next prime is 77407999. The reversal of 77407976 is 67970477.

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 77407976.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 254480 + ... + 254783.

It is an arithmetic number, because the mean of its divisors is an integer number (9548700).

Almost surely, 2^77407976 is an apocalyptic number.

77407976 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

77407976 is a deficient number, since it is larger than the sum of its proper divisors (75371224).

77407976 is a wasteful number, since it uses less digits than its factorization.

77407976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509288 (or 509284 counting only the distinct ones).

The product of its (nonzero) digits is 518616, while the sum is 47.

The square root of 77407976 is about 8798.1802663960. The cubic root of 77407976 is about 426.1821317056.

The spelling of 77407976 in words is "seventy-seven million, four hundred seven thousand, nine hundred seventy-six".