28456875 has 30 divisors (see below), whose sum is σ = 51374180. Its totient is φ = 15174000.

The previous prime is 28456873. The next prime is 28456891. The reversal of 28456875 is 57865482.

28456875 is a `hidden beast` number, since 2 + 84 + 568 + 7 + 5 = 666.

It is not a de Polignac number, because 28456875 - 2¹ = 28456873 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 28456875.

It is not an unprimeable number, because it can be changed into a prime (28456873) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 3096 + ... + 8154.

Almost surely, 2^28456875 is an apocalyptic number.

28456875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28456875 is a deficient number, since it is larger than the sum of its proper divisors (22917305).

28456875 is an equidigital number, since it uses as much as digits as its factorization.

28456875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5085 (or 5067 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The square root of 28456875 is about 5334.4985706250. The cubic root of 28456875 is about 305.3015918528.

The spelling of 28456875 in words is "twenty-eight million, four hundred fifty-six thousand, eight hundred seventy-five".