77392816 has 10 divisors (see below), whose sum is σ = 149948612. Its totient is φ = 38696400.

The previous prime is 77392813. The next prime is 77392831. The reversal of 77392816 is 61829377.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (77392811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2418510 + ... + 2418541.

Almost surely, 2^77392816 is an apocalyptic number.

It is an amenable number.

77392816 is a deficient number, since it is larger than the sum of its proper divisors (72555796).

77392816 is a wasteful number, since it uses less digits than its factorization.

77392816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4837059 (or 4837053 counting only the distinct ones).

The product of its digits is 127008, while the sum is 43.

The square root of 77392816 is about 8797.3186824168. The cubic root of 77392816 is about 426.1543079451.

The spelling of 77392816 in words is "seventy-seven million, three hundred ninety-two thousand, eight hundred sixteen".