28090875 has 32 divisors (see below), whose sum is σ = 47121984. Its totient is φ = 14860800.

The previous prime is 28090859. The next prime is 28090877. The reversal of 28090875 is 57809082.

It is not a de Polignac number, because 28090875 - 2⁴ = 28090859 is a prime.

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 (28090877) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64659 + ... + 65091.

It is an arithmetic number, because the mean of its divisors is an integer number (1472562).

Almost surely, 2^28090875 is an apocalyptic number.

28090875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28090875 is a deficient number, since it is larger than the sum of its proper divisors (19031109).

28090875 is a wasteful number, since it uses less digits than its factorization.

28090875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624 (or 614 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 28090875 is about 5300.0825465270. The cubic root of 28090875 is about 303.9870543599.

It can be divided in two parts, 280908 and 75, that multiplied together give a square (21068100 = 4590²).

The spelling of 28090875 in words is "twenty-eight million, ninety thousand, eight hundred seventy-five".