77946872 has 16 divisors (see below), whose sum is σ = 147658560. Its totient is φ = 38571264.

The previous prime is 77946833. The next prime is 77946893. The reversal of 77946872 is 27864977.

It is a self number, because there is not a number n which added to its sum of digits gives 77946872.

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, 49448 + ... + 50999.

It is an arithmetic number, because the mean of its divisors is an integer number (9228660).

Almost surely, 2^77946872 is an apocalyptic number.

It is an amenable number.

77946872 is a deficient number, since it is larger than the sum of its proper divisors (69711688).

77946872 is a wasteful number, since it uses less digits than its factorization.

77946872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100550 (or 100546 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 50.

The square root of 77946872 is about 8828.7525732688. The cubic root of 77946872 is about 427.1688385253.

The spelling of 77946872 in words is "seventy-seven million, nine hundred forty-six thousand, eight hundred seventy-two".