28344825 has 36 divisors (see below), whose sum is σ = 51068160. Its totient is φ = 15028320.

The previous prime is 28344821. The next prime is 28344857. The reversal of 28344825 is 52844382.

It is not a de Polignac number, because 28344825 - 2² = 28344821 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28344825.

It is not an unprimeable number, because it can be changed into a prime (28344821) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 58936 + ... + 59414.

It is an arithmetic number, because the mean of its divisors is an integer number (1418560).

Almost surely, 2^28344825 is an apocalyptic number.

28344825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28344825 is a deficient number, since it is larger than the sum of its proper divisors (22723335).

28344825 is a wasteful number, since it uses less digits than its factorization.

28344825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758 (or 750 counting only the distinct ones).

The product of its digits is 61440, while the sum is 36.

The square root of 28344825 is about 5323.9858189142. The cubic root of 28344825 is about 304.9003526486.

The spelling of 28344825 in words is "twenty-eight million, three hundred forty-four thousand, eight hundred twenty-five".