28940875 has 16 divisors (see below), whose sum is σ = 37005696. Its totient is φ = 22584000.

The previous prime is 28940797. The next prime is 28940881. The reversal of 28940875 is 57804982.

It is a de Polignac number, because none of the positive numbers 2^k-28940875 is a prime.

It is a Duffinian number.

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, 2302 + ... + 7948.

It is an arithmetic number, because the mean of its divisors is an integer number (2312856).

Almost surely, 2^28940875 is an apocalyptic number.

28940875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28940875 is a deficient number, since it is larger than the sum of its proper divisors (8064821).

28940875 is an equidigital number, since it uses as much as digits as its factorization.

28940875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5703 (or 5693 counting only the distinct ones).

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

The square root of 28940875 is about 5379.6723877946. The cubic root of 28940875 is about 307.0227465666.

The spelling of 28940875 in words is "twenty-eight million, nine hundred forty thousand, eight hundred seventy-five".