28165244 has 6 divisors (see below), whose sum is σ = 49289184. Its totient is φ = 14082620.

The previous prime is 28165223. The next prime is 28165261. The reversal of 28165244 is 44256182.

It is a self number, because there is not a number n which added to its sum of digits gives 28165244.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3520652 + ... + 3520659.

It is an arithmetic number, because the mean of its divisors is an integer number (8214864).

Almost surely, 2^28165244 is an apocalyptic number.

It is an amenable number.

28165244 is a deficient number, since it is larger than the sum of its proper divisors (21123940).

28165244 is a wasteful number, since it uses less digits than its factorization.

28165244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7041315 (or 7041313 counting only the distinct ones).

The product of its digits is 15360, while the sum is 32.

The square root of 28165244 is about 5307.0937432836. The cubic root of 28165244 is about 304.2550808050.

The spelling of 28165244 in words is "twenty-eight million, one hundred sixty-five thousand, two hundred forty-four".