77929144 has 16 divisors (see below), whose sum is σ = 146637720. Its totient is φ = 38825760.

The previous prime is 77929123. The next prime is 77929153. The reversal of 77929144 is 44192977.

It is a self number, because there is not a number n which added to its sum of digits gives 77929144.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14947 + ... + 19474.

Almost surely, 2^77929144 is an apocalyptic number.

It is an amenable number.

77929144 is a deficient number, since it is larger than the sum of its proper divisors (68708576).

77929144 is a wasteful number, since it uses less digits than its factorization.

77929144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34710 (or 34706 counting only the distinct ones).

The product of its digits is 127008, while the sum is 43.

The square root of 77929144 is about 8827.7485238310. The cubic root of 77929144 is about 427.1364514084.

The spelling of 77929144 in words is "seventy-seven million, nine hundred twenty-nine thousand, one hundred forty-four".