28251844 has 12 divisors (see below), whose sum is σ = 49545664. Its totient is φ = 14095944.

The previous prime is 28251833. The next prime is 28251857. The reversal of 28251844 is 44815282.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 5304 + ... + 9199.

Almost surely, 2^28251844 is an apocalyptic number.

It is an amenable number.

28251844 is a deficient number, since it is larger than the sum of its proper divisors (21293820).

28251844 is a wasteful number, since it uses less digits than its factorization.

28251844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14994 (or 14992 counting only the distinct ones).

The product of its digits is 20480, while the sum is 34.

The square root of 28251844 is about 5315.2463724648. The cubic root of 28251844 is about 304.5665939517.

The spelling of 28251844 in words is "twenty-eight million, two hundred fifty-one thousand, eight hundred forty-four".