28225045 has 8 divisors (see below), whose sum is σ = 33992280. Its totient is φ = 22498560.

The previous prime is 28225039. The next prime is 28225073. The reversal of 28225045 is 54052282.

It can be written as a sum of positive squares in 4 ways, for example, as 1164241 + 27060804 = 1079^2 + 5202^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28225045 - 2³ = 28225037 is a prime.

It is a congruent number.

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, 8640 + ... + 11449.

It is an arithmetic number, because the mean of its divisors is an integer number (4249035).

Almost surely, 2^28225045 is an apocalyptic number.

It is an amenable number.

28225045 is a deficient number, since it is larger than the sum of its proper divisors (5767235).

28225045 is a wasteful number, since it uses less digits than its factorization.

28225045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20375.

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 28225045 is about 5312.7248187724. The cubic root of 28225045 is about 304.4702620416.

The spelling of 28225045 in words is "twenty-eight million, two hundred twenty-five thousand, forty-five".