28286504 has 32 divisors (see below), whose sum is σ = 58605120. Its totient is φ = 12731136.

The previous prime is 28286501. The next prime is 28286507. The reversal of 28286504 is 40568282.

It is an interprime number because it is at equal distance from previous prime (28286501) and next prime (28286507).

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (28286501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1394 + ... + 7649.

It is an arithmetic number, because the mean of its divisors is an integer number (1831410).

Almost surely, 2^28286504 is an apocalyptic number.

It is an amenable number.

28286504 is an abundant number, since it is smaller than the sum of its proper divisors (30318616).

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

28286504 is a wasteful number, since it uses less digits than its factorization.

28286504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9089 (or 9085 counting only the distinct ones).

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

The square root of 28286504 is about 5318.5058052051. The cubic root of 28286504 is about 304.6910927773.

The spelling of 28286504 in words is "twenty-eight million, two hundred eighty-six thousand, five hundred four".