77105912 has 64 divisors (see below), whose sum is σ = 161935200. Its totient is φ = 34394880.

The previous prime is 77105909. The next prime is 77105939. The reversal of 77105912 is 21950177.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 720563 + ... + 720669.

Almost surely, 2^77105912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77105912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80967600).

77105912 is an abundant number, since it is smaller than the sum of its proper divisors (84829288).

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

77105912 is a wasteful number, since it uses less digits than its factorization.

77105912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193 (or 163 counting only the distinct ones).

The product of its (nonzero) digits is 4410, while the sum is 32.

The square root of 77105912 is about 8780.9972098845. The cubic root of 77105912 is about 425.6270549961.

The spelling of 77105912 in words is "seventy-seven million, one hundred five thousand, nine hundred twelve".