22089729 has 8 divisors (see below), whose sum is σ = 30733632. Its totient is φ = 14086160.

The previous prime is 22089721. The next prime is 22089731. The reversal of 22089729 is 92798022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22089729 - 2³ = 22089721 is a prime.

It is a super-2 number, since 2×22089729² = 975912254586882, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22089721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160002 + ... + 160139.

It is an arithmetic number, because the mean of its divisors is an integer number (3841704).

Almost surely, 2^22089729 is an apocalyptic number.

It is an amenable number.

22089729 is a deficient number, since it is larger than the sum of its proper divisors (8643903).

22089729 is a wasteful number, since it uses less digits than its factorization.

22089729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320167.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 22089729 is about 4699.9711701243. The cubic root of 22089729 is about 280.5843620666.

The spelling of 22089729 in words is "twenty-two million, eighty-nine thousand, seven hundred twenty-nine".