770022656 has 72 divisors (see below), whose sum is σ = 1662274824. Its totient is φ = 353894400.

The previous prime is 770022653. The next prime is 770022679. The reversal of 770022656 is 656220077.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 465869056 + 304153600 = 21584^2 + 17440^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (770022653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1334240 + ... + 1334816.

Almost surely, 2^770022656 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 770022656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (831137412).

770022656 is an abundant number, since it is smaller than the sum of its proper divisors (892252168).

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

770022656 is a wasteful number, since it uses less digits than its factorization.

770022656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007 (or 993 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 770022656 is about 27749.2820808035. The cubic root of 770022656 is about 916.5746348303.

The spelling of 770022656 in words is "seven hundred seventy million, twenty-two thousand, six hundred fifty-six".