77317056 has 84 divisors (see below), whose sum is σ = 222885000. Its totient is φ = 25625088.

The previous prime is 77317043. The next prime is 77317067. The reversal of 77317056 is 65071377.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 77317056.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 154695 + ... + 155193.

Almost surely, 2^77317056 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 77317056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111442500).

77317056 is an abundant number, since it is smaller than the sum of its proper divisors (145567944).

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

77317056 is a wasteful number, since it uses less digits than its factorization.

77317056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786 (or 773 counting only the distinct ones).

The product of its (nonzero) digits is 30870, while the sum is 36.

The square root of 77317056 is about 8793.0117707188. The cubic root of 77317056 is about 426.0152080797.

The spelling of 77317056 in words is "seventy-seven million, three hundred seventeen thousand, fifty-six".