28553875 has 16 divisors (see below), whose sum is σ = 40727232. Its totient is φ = 19579200.

The previous prime is 28553869. The next prime is 28553881. The reversal of 28553875 is 57835582.

It is an interprime number because it is at equal distance from previous prime (28553869) and next prime (28553881).

It is not a de Polignac number, because 28553875 - 2³ = 28553867 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15442 + ... + 17191.

It is an arithmetic number, because the mean of its divisors is an integer number (2545452).

Almost surely, 2^28553875 is an apocalyptic number.

28553875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28553875 is a deficient number, since it is larger than the sum of its proper divisors (12173357).

28553875 is an equidigital number, since it uses as much as digits as its factorization.

28553875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32655 (or 32645 counting only the distinct ones).

The product of its digits is 336000, while the sum is 43.

The square root of 28553875 is about 5343.5825997172. The cubic root of 28553875 is about 305.6480889015.

The spelling of 28553875 in words is "twenty-eight million, five hundred fifty-three thousand, eight hundred seventy-five".