28660825 has 12 divisors (see below), whose sum is σ = 35673808. Its totient is φ = 22842000.

The previous prime is 28660817. The next prime is 28660837. The reversal of 28660825 is 52806682.

It is not a de Polignac number, because 28660825 - 2³ = 28660817 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5050 + ... + 9100.

Almost surely, 2^28660825 is an apocalyptic number.

28660825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28660825 is a deficient number, since it is larger than the sum of its proper divisors (7012983).

28660825 is a wasteful number, since it uses less digits than its factorization.

28660825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4344 (or 4339 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 28660825 is about 5353.5805775201. The cubic root of 28660825 is about 306.0292203005.

The spelling of 28660825 in words is "twenty-eight million, six hundred sixty thousand, eight hundred twenty-five".