28386250 has 20 divisors (see below), whose sum is σ = 53209530. Its totient is φ = 11354000.

The previous prime is 28386223. The next prime is 28386251. The reversal of 28386250 is 5268382.

It can be written as a sum of positive squares in 5 ways, for example, as 1750329 + 26635921 = 1323^2 + 5161^2 .

It is not an unprimeable number, because it can be changed into a prime (28386251) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 10105 + ... + 12604.

Almost surely, 2^28386250 is an apocalyptic number.

28386250 is a deficient number, since it is larger than the sum of its proper divisors (24823280).

28386250 is an equidigital number, since it uses as much as digits as its factorization.

28386250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22731 (or 22716 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 28386250 is about 5327.8748108416. The cubic root of 28386250 is about 305.0488141883.

The spelling of 28386250 in words is "twenty-eight million, three hundred eighty-six thousand, two hundred fifty".