28768456 has 16 divisors (see below), whose sum is σ = 54117900. Its totient is φ = 14337024.

The previous prime is 28768447. The next prime is 28768457. The reversal of 28768456 is 65486782.

It can be written as a sum of positive squares in 2 ways, for example, as 22184100 + 6584356 = 4710^2 + 2566^2 .

It is not an unprimeable number, because it can be changed into a prime (28768457) 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, 3241 + ... + 8248.

Almost surely, 2^28768456 is an apocalyptic number.

It is an amenable number.

28768456 is a deficient number, since it is larger than the sum of its proper divisors (25349444).

28768456 is a wasteful number, since it uses less digits than its factorization.

28768456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11808 (or 11804 counting only the distinct ones).

The product of its digits is 645120, while the sum is 46.

The square root of 28768456 is about 5363.6234021415. The cubic root of 28768456 is about 306.4118225162.

The spelling of 28768456 in words is "twenty-eight million, seven hundred sixty-eight thousand, four hundred fifty-six".