77708856 has 16 divisors (see below), whose sum is σ = 194272200. Its totient is φ = 25902944.

The previous prime is 77708849. The next prime is 77708863. The reversal of 77708856 is 65880777.

It is an interprime number because it is at equal distance from previous prime (77708849) and next prime (77708863).

It is a congruent number.

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, 1618911 + ... + 1618958.

Almost surely, 2^77708856 is an apocalyptic number.

It is an amenable number.

77708856 is an abundant number, since it is smaller than the sum of its proper divisors (116563344).

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

77708856 is a wasteful number, since it uses less digits than its factorization.

77708856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3237878 (or 3237874 counting only the distinct ones).

The product of its (nonzero) digits is 658560, while the sum is 48.

The square root of 77708856 is about 8815.2626733411. The cubic root of 77708856 is about 426.7335989831.

The spelling of 77708856 in words is "seventy-seven million, seven hundred eight thousand, eight hundred fifty-six".