77809104 has 60 divisors (see below), whose sum is σ = 229226400. Its totient is φ = 24570432.

The previous prime is 77809093. The next prime is 77809133. The reversal of 77809104 is 40190877.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11484 + ... + 16955.

It is an arithmetic number, because the mean of its divisors is an integer number (3820440).

Almost surely, 2^77809104 is an apocalyptic number.

It is an amenable number.

77809104 is an abundant number, since it is smaller than the sum of its proper divisors (151417296).

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

77809104 is a wasteful number, since it uses less digits than its factorization.

77809104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28472 (or 28463 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 77809104 is about 8820.9468879480. The cubic root of 77809104 is about 426.9170221239.

The spelling of 77809104 in words is "seventy-seven million, eight hundred nine thousand, one hundred four".