28344625 has 16 divisors (see below), whose sum is σ = 36915840. Its totient is φ = 21687600.

The previous prime is 28344587. The next prime is 28344649. The reversal of 28344625 is 52644382.

It is not a de Polignac number, because 28344625 - 2⁷ = 28344497 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2055 + ... + 7804.

It is an arithmetic number, because the mean of its divisors is an integer number (2307240).

Almost surely, 2^28344625 is an apocalyptic number.

28344625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28344625 is a deficient number, since it is larger than the sum of its proper divisors (8571215).

28344625 is an equidigital number, since it uses as much as digits as its factorization.

28344625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9897 (or 9887 counting only the distinct ones).

The product of its digits is 46080, while the sum is 34.

The square root of 28344625 is about 5323.9670359611. The cubic root of 28344625 is about 304.8996355252.

The spelling of 28344625 in words is "twenty-eight million, three hundred forty-four thousand, six hundred twenty-five".