28285250 has 48 divisors (see below), whose sum is σ = 61621560. Its totient is φ = 9693600.

The previous prime is 28285241. The next prime is 28285253. The reversal of 28285250 is 5258282.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13300609 + 14984641 = 3647^2 + 3871^2 .

It is not an unprimeable number, because it can be changed into a prime (28285253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11096 + ... + 13404.

Almost surely, 2^28285250 is an apocalyptic number.

28285250 is an abundant number, since it is smaller than the sum of its proper divisors (33336310).

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

28285250 is a wasteful number, since it uses less digits than its factorization.

28285250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2340 (or 2323 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 32.

The square root of 28285250 is about 5318.3879136445. The cubic root of 28285250 is about 304.6865901792.

The spelling of 28285250 in words is "twenty-eight million, two hundred eighty-five thousand, two hundred fifty".