77189872 has 20 divisors (see below), whose sum is σ = 149729256. Its totient is φ = 38550080.

The previous prime is 77189867. The next prime is 77189899. The reversal of 77189872 is 27898177.

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 3 ways as a sum of consecutive naturals, for example, 14703 + ... + 19249.

Almost surely, 2^77189872 is an apocalyptic number.

It is an amenable number.

77189872 is a deficient number, since it is larger than the sum of its proper divisors (72539384).

77189872 is a wasteful number, since it uses less digits than its factorization.

77189872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5616 (or 5610 counting only the distinct ones).

The product of its digits is 395136, while the sum is 49.

The square root of 77189872 is about 8785.7766873510. The cubic root of 77189872 is about 425.7814862354.

The spelling of 77189872 in words is "seventy-seven million, one hundred eighty-nine thousand, eight hundred seventy-two".