77678604 has 18 divisors (see below), whose sum is σ = 196354340. Its totient is φ = 25892856.

The previous prime is 77678581. The next prime is 77678611. The reversal of 77678604 is 40687677.

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 77678604.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1078834 + ... + 1078905.

Almost surely, 2^77678604 is an apocalyptic number.

It is an amenable number.

77678604 is an abundant number, since it is smaller than the sum of its proper divisors (118675736).

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

77678604 is a wasteful number, since it uses less digits than its factorization.

77678604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2157749 (or 2157744 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 45.

The square root of 77678604 is about 8813.5466187001. The cubic root of 77678604 is about 426.6782161045.

The spelling of 77678604 in words is "seventy-seven million, six hundred seventy-eight thousand, six hundred four".