28108125 has 60 divisors (see below), whose sum is σ = 53607840. Its totient is φ = 14148000.

The previous prime is 28108109. The next prime is 28108177. The reversal of 28108125 is 52180182.

It is not a de Polignac number, because 28108125 - 2⁴ = 28108109 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 106744 + ... + 107006.

It is an arithmetic number, because the mean of its divisors is an integer number (893464).

Almost surely, 2^28108125 is an apocalyptic number.

28108125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28108125 is a deficient number, since it is larger than the sum of its proper divisors (25499715).

28108125 is a wasteful number, since it uses less digits than its factorization.

28108125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308 (or 290 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 28108125 is about 5301.7096299213. The cubic root of 28108125 is about 304.0492655903.

The spelling of 28108125 in words is "twenty-eight million, one hundred eight thousand, one hundred twenty-five".