7647728922 has 12 divisors (see below), whose sum is σ = 16570079370. Its totient is φ = 2549242968.

The previous prime is 7647728917. The next prime is 7647728941. The reversal of 7647728922 is 2298277467.

It is a happy number.

7647728922 is a `hidden beast` number, since 76 + 477 + 2 + 89 + 22 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5839863561 + 1807865361 = 76419^2 + 42519^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 212436897 + ... + 212436932.

Almost surely, 2^7647728922 is an apocalyptic number.

7647728922 is an abundant number, since it is smaller than the sum of its proper divisors (8922350448).

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

7647728922 is a wasteful number, since it uses less digits than its factorization.

7647728922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424873837 (or 424873834 counting only the distinct ones).

The product of its digits is 4741632, while the sum is 54.

The square root of 7647728922 is about 87451.2945701777. The cubic root of 7647728922 is about 1970.2023310786.

The spelling of 7647728922 in words is "seven billion, six hundred forty-seven million, seven hundred twenty-eight thousand, nine hundred twenty-two".