28253944 has 16 divisors (see below), whose sum is σ = 53395200. Its totient is φ = 14015232.

The previous prime is 28253933. The next prime is 28253963. The reversal of 28253944 is 44935282.

It is a happy number.

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, 12889 + ... + 14920.

It is an arithmetic number, because the mean of its divisors is an integer number (3337200).

Almost surely, 2^28253944 is an apocalyptic number.

It is an amenable number.

28253944 is a deficient number, since it is larger than the sum of its proper divisors (25141256).

28253944 is a wasteful number, since it uses less digits than its factorization.

28253944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27942 (or 27938 counting only the distinct ones).

The product of its digits is 69120, while the sum is 37.

The square root of 28253944 is about 5315.4439137291. The cubic root of 28253944 is about 304.5741400550.

The spelling of 28253944 in words is "twenty-eight million, two hundred fifty-three thousand, nine hundred forty-four".