28539250 has 16 divisors (see below), whose sum is σ = 53425944. Its totient is φ = 11415600.

The previous prime is 28539241. The next prime is 28539283. The reversal of 28539250 is 5293582.

It can be written as a sum of positive squares in 4 ways, for example, as 15077689 + 13461561 = 3883^2 + 3669^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56829 + ... + 57328.

Almost surely, 2^28539250 is an apocalyptic number.

28539250 is a deficient number, since it is larger than the sum of its proper divisors (24886694).

28539250 is a wasteful number, since it uses less digits than its factorization.

28539250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114174 (or 114164 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 28539250 is about 5342.2139605224. The cubic root of 28539250 is about 305.5958967245.

The spelling of 28539250 in words is "twenty-eight million, five hundred thirty-nine thousand, two hundred fifty".