77320704 has 80 divisors (see below), whose sum is σ = 209183040. Its totient is φ = 25374720.

The previous prime is 77320673. The next prime is 77320721. The reversal of 77320704 is 40702377.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108702 + ... + 109410.

It is an arithmetic number, because the mean of its divisors is an integer number (2614788).

Almost surely, 2^77320704 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77320704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104591520).

77320704 is an abundant number, since it is smaller than the sum of its proper divisors (131862336).

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

77320704 is an equidigital number, since it uses as much as digits as its factorization.

77320704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801 (or 785 counting only the distinct ones).

The product of its (nonzero) digits is 8232, while the sum is 30.

The square root of 77320704 is about 8793.2192057289. The cubic root of 77320704 is about 426.0219081065.

The spelling of 77320704 in words is "seventy-seven million, three hundred twenty thousand, seven hundred four".