77743812 has 48 divisors (see below), whose sum is σ = 184647680. Its totient is φ = 25456032.

The previous prime is 77743811. The next prime is 77743819. The reversal of 77743812 is 21834777.

It is not an unprimeable number, because it can be changed into a prime (77743811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211653 + ... + 212019.

Almost surely, 2^77743812 is an apocalyptic number.

It is an amenable number.

77743812 is an abundant number, since it is smaller than the sum of its proper divisors (106903868).

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

77743812 is a wasteful number, since it uses less digits than its factorization.

77743812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640 (or 638 counting only the distinct ones).

The product of its digits is 65856, while the sum is 39.

The square root of 77743812 is about 8817.2451480040. The cubic root of 77743812 is about 426.7975756618.

The spelling of 77743812 in words is "seventy-seven million, seven hundred forty-three thousand, eight hundred twelve".