28272250 has 16 divisors (see below), whose sum is σ = 52926120. Its totient is φ = 11308800.

The previous prime is 28272203. The next prime is 28272259. The reversal of 28272250 is 5227282.

It can be written as a sum of positive squares in 4 ways, for example, as 7778521 + 20493729 = 2789^2 + 4527^2 .

It is not an unprimeable number, because it can be changed into a prime (28272259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56295 + ... + 56794.

Almost surely, 2^28272250 is an apocalyptic number.

28272250 is a deficient number, since it is larger than the sum of its proper divisors (24653870).

28272250 is a wasteful number, since it uses less digits than its factorization.

28272250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113106 (or 113096 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 28272250 is about 5317.1655983240. The cubic root of 28272250 is about 304.6399046847.

The spelling of 28272250 in words is "twenty-eight million, two hundred seventy-two thousand, two hundred fifty".