28251875 has 20 divisors (see below), whose sum is σ = 37394280. Its totient is φ = 21264000.

The previous prime is 28251871. The next prime is 28251877. The reversal of 28251875 is 57815282.

It is a happy number.

It is not a de Polignac number, because 28251875 - 2² = 28251871 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28251871) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9296 + ... + 11954.

It is an arithmetic number, because the mean of its divisors is an integer number (1869714).

Almost surely, 2^28251875 is an apocalyptic number.

28251875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28251875 is a deficient number, since it is larger than the sum of its proper divisors (9142405).

28251875 is an equidigital number, since it uses as much as digits as its factorization.

28251875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2696 (or 2681 counting only the distinct ones).

The product of its digits is 44800, while the sum is 38.

The square root of 28251875 is about 5315.2492886035. The cubic root of 28251875 is about 304.5667053493.

The spelling of 28251875 in words is "twenty-eight million, two hundred fifty-one thousand, eight hundred seventy-five".