28860825 has 24 divisors (see below), whose sum is σ = 54534208. Its totient is φ = 13193280.

The previous prime is 28860817. The next prime is 28860827. The reversal of 28860825 is 52806882.

It is not a de Polignac number, because 28860825 - 2³ = 28860817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28860827) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26962 + ... + 28011.

Almost surely, 2^28860825 is an apocalyptic number.

28860825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28860825 is a deficient number, since it is larger than the sum of its proper divisors (25673383).

28860825 is a wasteful number, since it uses less digits than its factorization.

28860825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54993 (or 54988 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 39.

The square root of 28860825 is about 5372.2271917707. The cubic root of 28860825 is about 306.7394118279.

The spelling of 28860825 in words is "twenty-eight million, eight hundred sixty thousand, eight hundred twenty-five".