77904930 has 32 divisors (see below), whose sum is σ = 190041408. Its totient is φ = 20433600.

The previous prime is 77904929. The next prime is 77904941. The reversal of 77904930 is 3940977.

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 15 ways as a sum of consecutive naturals, for example, 19456 + ... + 23115.

It is an arithmetic number, because the mean of its divisors is an integer number (5938794).

Almost surely, 2^77904930 is an apocalyptic number.

77904930 is an abundant number, since it is smaller than the sum of its proper divisors (112136478).

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

77904930 is a wasteful number, since it uses less digits than its factorization.

77904930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42642.

The product of its (nonzero) digits is 47628, while the sum is 39.

The square root of 77904930 is about 8826.3769464033. The cubic root of 77904930 is about 427.0922071419.

It can be divided in two parts, 7790 and 4930, that added together give a triangular number (12720 = T₁₅₉).

The spelling of 77904930 in words is "seventy-seven million, nine hundred four thousand, nine hundred thirty".