28956250 has 48 divisors (see below), whose sum is σ = 56105784. Its totient is φ = 11200000.

The previous prime is 28956229. The next prime is 28956251. The reversal of 28956250 is 5265982.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 27636049 + 1320201 = 5257^2 + 1149^2 .

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28956251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 256194 + ... + 256306.

Almost surely, 2^28956250 is an apocalyptic number.

28956250 is a deficient number, since it is larger than the sum of its proper divisors (27149534).

28956250 is an equidigital number, since it uses as much as digits as its factorization.

28956250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181 (or 161 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 28956250 is about 5381.1011884186. The cubic root of 28956250 is about 307.0771061191.

The spelling of 28956250 in words is "twenty-eight million, nine hundred fifty-six thousand, two hundred fifty".