77783912 has 16 divisors (see below), whose sum is σ = 147349860. Its totient is φ = 38490624.

The previous prime is 77783873. The next prime is 77783921. The reversal of 77783912 is 21938777.

It can be written as a sum of positive squares in 2 ways, for example, as 72148036 + 5635876 = 8494^2 + 2374^2 .

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, 49343 + ... + 50894.

Almost surely, 2^77783912 is an apocalyptic number.

It is an amenable number.

77783912 is a deficient number, since it is larger than the sum of its proper divisors (69565948).

77783912 is a wasteful number, since it uses less digits than its factorization.

77783912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100340 (or 100336 counting only the distinct ones).

The product of its digits is 148176, while the sum is 44.

The square root of 77783912 is about 8819.5188077355. The cubic root of 77783912 is about 426.8709433063.

The spelling of 77783912 in words is "seventy-seven million, seven hundred eighty-three thousand, nine hundred twelve".