77685436 has 12 divisors (see below), whose sum is σ = 136204600. Its totient is φ = 38769840.

The previous prime is 77685409. The next prime is 77685449. The reversal of 77685436 is 63458677.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15786 + ... + 20113.

Almost surely, 2^77685436 is an apocalyptic number.

It is an amenable number.

77685436 is a deficient number, since it is larger than the sum of its proper divisors (58519164).

77685436 is a wasteful number, since it uses less digits than its factorization.

77685436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36444 (or 36442 counting only the distinct ones).

The product of its digits is 846720, while the sum is 46.

The square root of 77685436 is about 8813.9341953523. The cubic root of 77685436 is about 426.6907248261.

The spelling of 77685436 in words is "seventy-seven million, six hundred eighty-five thousand, four hundred thirty-six".