28107825 has 12 divisors (see below), whose sum is σ = 46471728. Its totient is φ = 14990800.

The previous prime is 28107811. The next prime is 28107839. The reversal of 28107825 is 52870182.

It is an interprime number because it is at equal distance from previous prime (28107811) and next prime (28107839).

It is not a de Polignac number, because 28107825 - 2⁴ = 28107809 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 187311 + ... + 187460.

It is an arithmetic number, because the mean of its divisors is an integer number (3872644).

Almost surely, 2^28107825 is an apocalyptic number.

28107825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28107825 is a deficient number, since it is larger than the sum of its proper divisors (18363903).

28107825 is a wasteful number, since it uses less digits than its factorization.

28107825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374784 (or 374779 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 28107825 is about 5301.6813370854. The cubic root of 28107825 is about 304.0481838733.

The spelling of 28107825 in words is "twenty-eight million, one hundred seven thousand, eight hundred twenty-five".