22128769 has 16 divisors (see below), whose sum is σ = 24998400. Its totient is φ = 19446336.

The previous prime is 22128767. The next prime is 22128779. The reversal of 22128769 is 96782122.

It is not a de Polignac number, because 22128769 - 2¹ = 22128767 is a prime.

It is a super-2 number, since 2×22128769² = 979364834910722, which contains 22 as substring.

It is a Duffinian number.

Its product of digits (24192) is a multiple of the sum of its prime divisors (864).

It is not an unprimeable number, because it can be changed into a prime (22128767) 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, 29412 + ... + 30154.

It is an arithmetic number, because the mean of its divisors is an integer number (1562400).

Almost surely, 2^22128769 is an apocalyptic number.

22128769 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

22128769 is a deficient number, since it is larger than the sum of its proper divisors (2869631).

22128769 is a wasteful number, since it uses less digits than its factorization.

22128769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864.

The product of its digits is 24192, while the sum is 37.

The square root of 22128769 is about 4704.1225536757. The cubic root of 22128769 is about 280.7495605122.

The spelling of 22128769 in words is "twenty-two million, one hundred twenty-eight thousand, seven hundred sixty-nine".