77900730 has 32 divisors (see below), whose sum is σ = 187299648. Its totient is φ = 20736000.

The previous prime is 77900717. The next prime is 77900773. The reversal of 77900730 is 3700977.

It is a junction number, because it is equal to n+sod(n) for n = 77900691 and 77900700.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17205 + ... + 21255.

It is an arithmetic number, because the mean of its divisors is an integer number (5853114).

Almost surely, 2^77900730 is an apocalyptic number.

77900730 is an abundant number, since it is smaller than the sum of its proper divisors (109398918).

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

77900730 is a wasteful number, since it uses less digits than its factorization.

77900730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4702.

The product of its (nonzero) digits is 9261, while the sum is 33.

The square root of 77900730 is about 8826.1390199792. The cubic root of 77900730 is about 427.0845318917.

The spelling of 77900730 in words is "seventy-seven million, nine hundred thousand, seven hundred thirty".