77979448 has 16 divisors (see below), whose sum is σ = 147195000. Its totient is φ = 38727456.

The previous prime is 77979431. The next prime is 77979449. The reversal of 77979448 is 84497977.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77979449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31518 + ... + 33901.

Almost surely, 2^77979448 is an apocalyptic number.

It is an amenable number.

77979448 is a deficient number, since it is larger than the sum of its proper divisors (69215552).

77979448 is a wasteful number, since it uses less digits than its factorization.

77979448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65574 (or 65570 counting only the distinct ones).

The product of its digits is 3556224, while the sum is 55.

The square root of 77979448 is about 8830.5972617938. The cubic root of 77979448 is about 427.2283385139.

The spelling of 77979448 in words is "seventy-seven million, nine hundred seventy-nine thousand, four hundred forty-eight".