28090245 has 16 divisors (see below), whose sum is σ = 46899072. Its totient is φ = 14329920.

The previous prime is 28090217. The next prime is 28090253. The reversal of 28090245 is 54209082.

It is not a de Polignac number, because 28090245 - 2⁵ = 28090213 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40366 + ... + 41055.

It is an arithmetic number, because the mean of its divisors is an integer number (2931192).

Almost surely, 2^28090245 is an apocalyptic number.

It is an amenable number.

28090245 is a deficient number, since it is larger than the sum of its proper divisors (18808827).

28090245 is a wasteful number, since it uses less digits than its factorization.

28090245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81452.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 28090245 is about 5300.0231131571. The cubic root of 28090245 is about 303.9847818155.

It can be divided in two parts, 280 and 90245, that added together give a triangular number (90525 = T₄₂₅).

The spelling of 28090245 in words is "twenty-eight million, ninety thousand, two hundred forty-five".