28365825 has 24 divisors (see below), whose sum is σ = 47327328. Its totient is φ = 14990080.

The previous prime is 28365811. The next prime is 28365839. The reversal of 28365825 is 52856382.

It is an interprime number because it is at equal distance from previous prime (28365811) and next prime (28365839).

It is not a de Polignac number, because 28365825 - 2⁷ = 28365697 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6802 + ... + 10148.

It is an arithmetic number, because the mean of its divisors is an integer number (1971972).

Almost surely, 2^28365825 is an apocalyptic number.

28365825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28365825 is a deficient number, since it is larger than the sum of its proper divisors (18961503).

28365825 is a wasteful number, since it uses less digits than its factorization.

28365825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3473 (or 3468 counting only the distinct ones).

The product of its digits is 115200, while the sum is 39.

The square root of 28365825 is about 5325.9576603649. The cubic root of 28365825 is about 304.9756318433.

The spelling of 28365825 in words is "twenty-eight million, three hundred sixty-five thousand, eight hundred twenty-five".