28005250 has 64 divisors (see below), whose sum is σ = 64576512. Its totient is φ = 8856000.

The previous prime is 28005247. The next prime is 28005269. The reversal of 28005250 is 5250082.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22135 + ... + 23365.

It is an arithmetic number, because the mean of its divisors is an integer number (1009008).

Almost surely, 2^28005250 is an apocalyptic number.

28005250 is an abundant number, since it is smaller than the sum of its proper divisors (36571262).

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

28005250 is a wasteful number, since it uses less digits than its factorization.

28005250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1268 (or 1258 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 28005250 is about 5291.9986772485. The cubic root of 28005250 is about 303.6778746826.

The spelling of 28005250 in words is "twenty-eight million, five thousand, two hundred fifty".