28402568 has 16 divisors (see below), whose sum is σ = 56058000. Its totient is φ = 13453776.

The previous prime is 28402567. The next prime is 28402579. The reversal of 28402568 is 86520482.

It is not an unprimeable number, because it can be changed into a prime (28402567) 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, 93278 + ... + 93581.

It is an arithmetic number, because the mean of its divisors is an integer number (3503625).

Almost surely, 2^28402568 is an apocalyptic number.

It is an amenable number.

28402568 is a deficient number, since it is larger than the sum of its proper divisors (27655432).

28402568 is a wasteful number, since it uses less digits than its factorization.

28402568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186884 (or 186880 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 35.

The square root of 28402568 is about 5329.4059706500. The cubic root of 28402568 is about 305.1072560163.

The spelling of 28402568 in words is "twenty-eight million, four hundred two thousand, five hundred sixty-eight".