28292875 has 32 divisors (see below), whose sum is σ = 39731328. Its totient is φ = 19958400.

The previous prime is 28292867. The next prime is 28292899. The reversal of 28292875 is 57829282.

It is not a de Polignac number, because 28292875 - 2³ = 28292867 is a prime.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36997 + ... + 37753.

It is an arithmetic number, because the mean of its divisors is an integer number (1241604).

Almost surely, 2^28292875 is an apocalyptic number.

28292875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28292875 is a deficient number, since it is larger than the sum of its proper divisors (11438453).

28292875 is a wasteful number, since it uses less digits than its factorization.

28292875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808 (or 798 counting only the distinct ones).

The product of its digits is 161280, while the sum is 43.

The square root of 28292875 is about 5319.1047179013. The cubic root of 28292875 is about 304.7139663619.

The spelling of 28292875 in words is "twenty-eight million, two hundred ninety-two thousand, eight hundred seventy-five".