77944 has 8 divisors (see below), whose sum is σ = 146160. Its totient is φ = 38968.

The previous prime is 77933. The next prime is 77951. The reversal of 77944 is 44977.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4864 + ... + 4879.

It is an arithmetic number, because the mean of its divisors is an integer number (18270).

2⁷⁷⁹⁴⁴ is an apocalyptic number.

It is an amenable number.

77944 is a deficient number, since it is larger than the sum of its proper divisors (68216).

77944 is a wasteful number, since it uses less digits than its factorization.

77944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9749 (or 9745 counting only the distinct ones).

The product of its digits is 7056, while the sum is 31.

The square root of 77944 is about 279.1845267919. The cubic root of 77944 is about 42.7163592029.

The spelling of 77944 in words is "seventy-seven thousand, nine hundred forty-four".