77917028 has 24 divisors (see below), whose sum is σ = 157352832. Its totient is φ = 33067584.

The previous prime is 77917027. The next prime is 77917039. The reversal of 77917028 is 82071977.

It is not an unprimeable number, because it can be changed into a prime (77917027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10625 + ... + 16392.

It is an arithmetic number, because the mean of its divisors is an integer number (6556368).

Almost surely, 2^77917028 is an apocalyptic number.

It is an amenable number.

77917028 is an abundant number, since it is smaller than the sum of its proper divisors (79435804).

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

77917028 is a wasteful number, since it uses less digits than its factorization.

77917028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27131 (or 27129 counting only the distinct ones).

The product of its (nonzero) digits is 49392, while the sum is 41.

The square root of 77917028 is about 8827.0622519613. The cubic root of 77917028 is about 427.1143139760.

The spelling of 77917028 in words is "seventy-seven million, nine hundred seventeen thousand, twenty-eight".