22688929 has 4 divisors (see below), whose sum is σ = 23117076. Its totient is φ = 22260784.

The previous prime is 22688927. The next prime is 22688957. The reversal of 22688929 is 92988622.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15586704 + 7102225 = 3948^2 + 2665^2 .

It is a cyclic number.

It is not a de Polignac number, because 22688929 - 2¹ = 22688927 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22688923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213994 + ... + 214099.

It is an arithmetic number, because the mean of its divisors is an integer number (5779269).

Almost surely, 2^22688929 is an apocalyptic number.

It is an amenable number.

22688929 is a deficient number, since it is larger than the sum of its proper divisors (428147).

22688929 is an equidigital number, since it uses as much as digits as its factorization.

22688929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428146.

The product of its digits is 248832, while the sum is 46.

The square root of 22688929 is about 4763.2897245496. The cubic root of 22688929 is about 283.0987805851.

The spelling of 22688929 in words is "twenty-two million, six hundred eighty-eight thousand, nine hundred twenty-nine".