77889112 has 32 divisors (see below), whose sum is σ = 172293120. Its totient is φ = 32303520.

The previous prime is 77889103. The next prime is 77889127. The reversal of 77889112 is 21198877.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 20698 + ... + 24169.

It is an arithmetic number, because the mean of its divisors is an integer number (5384160).

Almost surely, 2^77889112 is an apocalyptic number.

It is an amenable number.

77889112 is an abundant number, since it is smaller than the sum of its proper divisors (94404008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77889112 is a wasteful number, since it uses less digits than its factorization.

77889112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44911 (or 44907 counting only the distinct ones).

The product of its digits is 56448, while the sum is 43.

The square root of 77889112 is about 8825.4808367590. The cubic root of 77889112 is about 427.0632992503.

It can be divided in two parts, 7788 and 9112, that added together give a square (16900 = 130²).

The spelling of 77889112 in words is "seventy-seven million, eight hundred eighty-nine thousand, one hundred twelve".