77386768 has 20 divisors (see below), whose sum is σ = 150107580. Its totient is φ = 38649344.

The previous prime is 77386763. The next prime is 77386783. The reversal of 77386768 is 86768377.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12873744 + 64513024 = 3588^2 + 8032^2 .

It is a super-2 number, since 2×77386768² = 11977423722971648, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77386763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15348 + ... + 19756.

It is an arithmetic number, because the mean of its divisors is an integer number (7505379).

Almost surely, 2^77386768 is an apocalyptic number.

It is an amenable number.

77386768 is a deficient number, since it is larger than the sum of its proper divisors (72720812).

77386768 is a wasteful number, since it uses less digits than its factorization.

77386768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5514 (or 5508 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 52.

The square root of 77386768 is about 8796.9749346011. The cubic root of 77386768 is about 426.1432067925.

The spelling of 77386768 in words is "seventy-seven million, three hundred eighty-six thousand, seven hundred sixty-eight".