77021904 has 40 divisors (see below), whose sum is σ = 202353120. Its totient is φ = 25237888.

The previous prime is 77021899. The next prime is 77021911. The reversal of 77021904 is 40912077.

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 7 ways as a sum of consecutive naturals, for example, 10767 + ... + 16430.

It is an arithmetic number, because the mean of its divisors is an integer number (5058828).

Almost surely, 2^77021904 is an apocalyptic number.

It is an amenable number.

77021904 is an abundant number, since it is smaller than the sum of its proper divisors (125331216).

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

77021904 is a wasteful number, since it uses less digits than its factorization.

77021904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27267 (or 27261 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 77021904 is about 8776.2123948774. The cubic root of 77021904 is about 425.4724232255.

The spelling of 77021904 in words is "seventy-seven million, twenty-one thousand, nine hundred four".