77840976 has 40 divisors (see below), whose sum is σ = 202343200. Its totient is φ = 25785216.

The previous prime is 77840963. The next prime is 77840989. The reversal of 77840976 is 67904877.

It is an interprime number because it is at equal distance from previous prime (77840963) and next prime (77840989).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2850 + ... + 12798.

It is an arithmetic number, because the mean of its divisors is an integer number (5058580).

Almost surely, 2^77840976 is an apocalyptic number.

It is an amenable number.

77840976 is an abundant number, since it is smaller than the sum of its proper divisors (124502224).

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

77840976 is a wasteful number, since it uses less digits than its factorization.

77840976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10123 (or 10117 counting only the distinct ones).

The product of its (nonzero) digits is 592704, while the sum is 48.

The square root of 77840976 is about 8822.7533117502. The cubic root of 77840976 is about 426.9753051148.

The spelling of 77840976 in words is "seventy-seven million, eight hundred forty thousand, nine hundred seventy-six".