77908136 has 32 divisors (see below), whose sum is σ = 149230080. Its totient is φ = 38121600.

The previous prime is 77908133. The next prime is 77908157. The reversal of 77908136 is 63180977.

It is a zygodrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 77908093 and 77908102.

It is not an unprimeable number, because it can be changed into a prime (77908133) 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, 101996 + ... + 102756.

It is an arithmetic number, because the mean of its divisors is an integer number (4663440).

Almost surely, 2^77908136 is an apocalyptic number.

It is an amenable number.

77908136 is a deficient number, since it is larger than the sum of its proper divisors (71321944).

77908136 is a wasteful number, since it uses less digits than its factorization.

77908136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025 (or 1021 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 77908136 is about 8826.5585592574. The cubic root of 77908136 is about 427.0980657307.

The spelling of 77908136 in words is "seventy-seven million, nine hundred eight thousand, one hundred thirty-six".