28344028 has 12 divisors (see below), whose sum is σ = 49762720. Its totient is φ = 14126112.

The previous prime is 28344011. The next prime is 28344031. The reversal of 28344028 is 82044382.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10068 + ... + 12571.

Almost surely, 2^28344028 is an apocalyptic number.

It is an amenable number.

28344028 is a deficient number, since it is larger than the sum of its proper divisors (21418692).

28344028 is a wasteful number, since it uses less digits than its factorization.

28344028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22956 (or 22954 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 31.

The square root of 28344028 is about 5323.9109684517. The cubic root of 28344028 is about 304.8974948917.

The spelling of 28344028 in words is "twenty-eight million, three hundred forty-four thousand, twenty-eight".