28317025 has 48 divisors (see below), whose sum is σ = 41390208. Its totient is φ = 19166400.

The previous prime is 28317017. The next prime is 28317119. The reversal of 28317025 is 52071382.

It is not a de Polignac number, because 28317025 - 2³ = 28317017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28316984 and 28317002.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 765307 + ... + 765343.

It is an arithmetic number, because the mean of its divisors is an integer number (862296).

Almost surely, 2^28317025 is an apocalyptic number.

28317025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28317025 is a deficient number, since it is larger than the sum of its proper divisors (13073183).

28317025 is a wasteful number, since it uses less digits than its factorization.

28317025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103 (or 76 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 28317025 is about 5321.3743525522. The cubic root of 28317025 is about 304.8006401212.

The spelling of 28317025 in words is "twenty-eight million, three hundred seventeen thousand, twenty-five".