28392296656 has 20 divisors (see below), whose sum is σ = 55129416804. Its totient is φ = 14165350400.

The previous prime is 28392296651. The next prime is 28392296743. The reversal of 28392296656 is 65669229382.

It can be written as a sum of positive squares in 2 ways, for example, as 9066848400 + 19325448256 = 95220^2 + 139016^2 .

It is a super-2 number, since 2×28392296656² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28392296656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28392296651) 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, 1917265 + ... + 1932016.

Almost surely, 2^28392296656 is an apocalyptic number.

It is an amenable number.

28392296656 is a deficient number, since it is larger than the sum of its proper divisors (26737120148).

28392296656 is a wasteful number, since it uses less digits than its factorization.

28392296656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3849750 (or 3849744 counting only the distinct ones).

The product of its digits is 16796160, while the sum is 58.

The spelling of 28392296656 in words is "twenty-eight billion, three hundred ninety-two million, two hundred ninety-six thousand, six hundred fifty-six".