28672456 has 16 divisors (see below), whose sum is σ = 54155340. Its totient is φ = 14231040.

The previous prime is 28672453. The next prime is 28672471. The reversal of 28672456 is 65427682.

It can be written as a sum of positive squares in 2 ways, for example, as 28451556 + 220900 = 5334^2 + 470^2 .

It is not an unprimeable number, because it can be changed into a prime (28672451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11985 + ... + 14176.

Almost surely, 2^28672456 is an apocalyptic number.

It is an amenable number.

28672456 is a deficient number, since it is larger than the sum of its proper divisors (25482884).

28672456 is a wasteful number, since it uses less digits than its factorization.

28672456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26304 (or 26300 counting only the distinct ones).

The product of its digits is 161280, while the sum is 40.

The square root of 28672456 is about 5354.6667496680. Note that the first 3 decimals coincide. The cubic root of 28672456 is about 306.0706118105.

The spelling of 28672456 in words is "twenty-eight million, six hundred seventy-two thousand, four hundred fifty-six".