22028643 has 36 divisors (see below), whose sum is σ = 39396240. Its totient is φ = 11613888.

The previous prime is 22028639. The next prime is 22028659. The reversal of 22028643 is 34682022.

It is not a de Polignac number, because 22028643 - 2² = 22028639 is a prime.

It is a super-2 number, since 2×22028643² = 970522224842898, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22028623) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 9613 + ... + 11681.

It is an arithmetic number, because the mean of its divisors is an integer number (1094340).

Almost surely, 2^22028643 is an apocalyptic number.

22028643 is a deficient number, since it is larger than the sum of its proper divisors (17367597).

22028643 is a wasteful number, since it uses less digits than its factorization.

22028643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2108 (or 2092 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 22028643 is about 4693.4681206971. The cubic root of 22028643 is about 280.3254845907.

The spelling of 22028643 in words is "twenty-two million, twenty-eight thousand, six hundred forty-three".