28163250 has 48 divisors (see below), whose sum is σ = 76159512. Its totient is φ = 7509600.

The previous prime is 28163243. The next prime is 28163287. The reversal of 28163250 is 5236182.

28163250 is a `hidden beast` number, since 28 + 1 + 632 + 5 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 15610401 + 12552849 = 3951^2 + 3543^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4009 + ... + 8508.

Almost surely, 2^28163250 is an apocalyptic number.

28163250 is an abundant number, since it is smaller than the sum of its proper divisors (47996262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28163250 is a wasteful number, since it uses less digits than its factorization.

28163250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12540 (or 12527 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 28163250 is about 5306.9058781931. The cubic root of 28163250 is about 304.2479005731.

The spelling of 28163250 in words is "twenty-eight million, one hundred sixty-three thousand, two hundred fifty".