77439164 has 24 divisors (see below), whose sum is σ = 152938800. Its totient is φ = 33985280.

The previous prime is 77439143. The next prime is 77439179. The reversal of 77439164 is 46193477.

It is a congruent number.

It is an unprimeable number.

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, 29069 + ... + 31620.

It is an arithmetic number, because the mean of its divisors is an integer number (6372450).

Almost surely, 2^77439164 is an apocalyptic number.

It is an amenable number.

77439164 is a deficient number, since it is larger than the sum of its proper divisors (75499636).

77439164 is a wasteful number, since it uses less digits than its factorization.

77439164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60733 (or 60731 counting only the distinct ones).

The product of its digits is 127008, while the sum is 41.

The square root of 77439164 is about 8799.9524998718. The cubic root of 77439164 is about 426.2393608797.

The spelling of 77439164 in words is "seventy-seven million, four hundred thirty-nine thousand, one hundred sixty-four".