77908056 has 32 divisors (see below), whose sum is σ = 205022400. Its totient is φ = 24602400.

The previous prime is 77908021. The next prime is 77908057. The reversal of 77908056 is 65080977.

It is a junction number, because it is equal to n+sod(n) for n = 77907999 and 77908017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77908057) 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, 84970 + ... + 85881.

It is an arithmetic number, because the mean of its divisors is an integer number (6406950).

Almost surely, 2^77908056 is an apocalyptic number.

77908056 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

77908056 is an abundant number, since it is smaller than the sum of its proper divisors (127114344).

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

77908056 is a wasteful number, since it uses less digits than its factorization.

77908056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170879 (or 170875 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 42.

The square root of 77908056 is about 8826.5540274787. The cubic root of 77908056 is about 427.0979195420.

The spelling of 77908056 in words is "seventy-seven million, nine hundred eight thousand, fifty-six".