28093144 has 16 divisors (see below), whose sum is σ = 52771320. Its totient is φ = 14020800.

The previous prime is 28093103. The next prime is 28093181. The reversal of 28093144 is 44139082.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 1887 + ... + 7729.

Almost surely, 2^28093144 is an apocalyptic number.

It is an amenable number.

28093144 is a deficient number, since it is larger than the sum of its proper divisors (24678176).

28093144 is a wasteful number, since it uses less digits than its factorization.

28093144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6450 (or 6446 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 28093144 is about 5300.2965954746. The cubic root of 28093144 is about 303.9952388451.

The spelling of 28093144 in words is "twenty-eight million, ninety-three thousand, one hundred forty-four".