28022245 has 16 divisors (see below), whose sum is σ = 35533440. Its totient is φ = 21155904.

The previous prime is 28022243. The next prime is 28022251. The reversal of 28022245 is 54222082.

It is a cyclic number.

It is not a de Polignac number, because 28022245 - 2¹ = 28022243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28022243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37344 + ... + 38086.

It is an arithmetic number, because the mean of its divisors is an integer number (2220840).

Almost surely, 2^28022245 is an apocalyptic number.

It is an amenable number.

28022245 is a deficient number, since it is larger than the sum of its proper divisors (7511195).

28022245 is a wasteful number, since it uses less digits than its factorization.

28022245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1164.

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 28022245 is about 5293.6041597384. The cubic root of 28022245 is about 303.7392912842.

The spelling of 28022245 in words is "twenty-eight million, twenty-two thousand, two hundred forty-five".