28451568 has 20 divisors (see below), whose sum is σ = 73500008. Its totient is φ = 9483840.

The previous prime is 28451567. The next prime is 28451593. The reversal of 28451568 is 86515482.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28451567) 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, 296323 + ... + 296418.

Almost surely, 2^28451568 is an apocalyptic number.

It is an amenable number.

28451568 is an abundant number, since it is smaller than the sum of its proper divisors (45048440).

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

28451568 is a wasteful number, since it uses less digits than its factorization.

28451568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592752 (or 592746 counting only the distinct ones).

The product of its digits is 76800, while the sum is 39.

The square root of 28451568 is about 5334.0011248593. The cubic root of 28451568 is about 305.2826118315.

The spelling of 28451568 in words is "twenty-eight million, four hundred fifty-one thousand, five hundred sixty-eight".