22028605 has 16 divisors (see below), whose sum is σ = 26954928. Its totient is φ = 17280000.

The previous prime is 22028593. The next prime is 22028621. The reversal of 22028605 is 50682022.

It can be written as a sum of positive squares in 8 ways, for example, as 4356 + 22024249 = 66^2 + 4693^2 .

It is not a de Polignac number, because 22028605 - 2¹³ = 22020413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22028605.

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, 91285 + ... + 91525.

It is an arithmetic number, because the mean of its divisors is an integer number (1684683).

Almost surely, 2^22028605 is an apocalyptic number.

It is an amenable number.

22028605 is a deficient number, since it is larger than the sum of its proper divisors (4926323).

22028605 is a wasteful number, since it uses less digits than its factorization.

22028605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 22028605 is about 4693.4640725162. The cubic root of 22028605 is about 280.3253234010.

The spelling of 22028605 in words is "twenty-two million, twenty-eight thousand, six hundred five".