77136804 has 36 divisors (see below), whose sum is σ = 201277440. Its totient is φ = 24882480.

The previous prime is 77136791. The next prime is 77136811. The reversal of 77136804 is 40863177.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33444 + ... + 35675.

It is an arithmetic number, because the mean of its divisors is an integer number (5591040).

Almost surely, 2^77136804 is an apocalyptic number.

It is an amenable number.

77136804 is an abundant number, since it is smaller than the sum of its proper divisors (124140636).

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

77136804 is a wasteful number, since it uses less digits than its factorization.

77136804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69160 (or 69155 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 77136804 is about 8782.7560594611. The cubic root of 77136804 is about 425.6838890100.

The spelling of 77136804 in words is "seventy-seven million, one hundred thirty-six thousand, eight hundred four".