22028587 has 6 divisors (see below), whose sum is σ = 25625148. Its totient is φ = 18881604.

The previous prime is 22028563. The next prime is 22028593. The reversal of 22028587 is 78582022.

It is not a de Polignac number, because 22028587 - 2⁷ = 22028459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22028527) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 224733 + ... + 224830.

It is an arithmetic number, because the mean of its divisors is an integer number (4270858).

Almost surely, 2^22028587 is an apocalyptic number.

22028587 is a deficient number, since it is larger than the sum of its proper divisors (3596561).

22028587 is an equidigital number, since it uses as much as digits as its factorization.

22028587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449577 (or 449570 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 22028587 is about 4693.4621549556. The cubic root of 22028587 is about 280.3252470478.

The spelling of 22028587 in words is "twenty-two million, twenty-eight thousand, five hundred eighty-seven".