28939875 has 32 divisors (see below), whose sum is σ = 48509760. Its totient is φ = 15321600.

The previous prime is 28939847. The next prime is 28939877. The reversal of 28939875 is 57893982.

It is not a de Polignac number, because 28939875 - 2⁵ = 28939843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28939877) 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, 85707 + ... + 86043.

It is an arithmetic number, because the mean of its divisors is an integer number (1515930).

Almost surely, 2^28939875 is an apocalyptic number.

28939875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28939875 is a deficient number, since it is larger than the sum of its proper divisors (19569885).

28939875 is a wasteful number, since it uses less digits than its factorization.

28939875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584 (or 574 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 51.

The square root of 28939875 is about 5379.5794445291. The cubic root of 28939875 is about 307.0192103192.

The spelling of 28939875 in words is "twenty-eight million, nine hundred thirty-nine thousand, eight hundred seventy-five".