22729643 has 12 divisors (see below), whose sum is σ = 24323040. Its totient is φ = 21234096.

The previous prime is 22729631. The next prime is 22729657. The reversal of 22729643 is 34692722.

It is a happy number.

It is not a de Polignac number, because 22729643 - 2⁸ = 22729387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22729613) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28121 + ... + 28917.

It is an arithmetic number, because the mean of its divisors is an integer number (2026920).

Almost surely, 2^22729643 is an apocalyptic number.

22729643 is a deficient number, since it is larger than the sum of its proper divisors (1593397).

22729643 is an equidigital number, since it uses as much as digits as its factorization.

22729643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914 (or 895 counting only the distinct ones).

The product of its digits is 36288, while the sum is 35.

The square root of 22729643 is about 4767.5615360475. The cubic root of 22729643 is about 283.2680143160.

The spelling of 22729643 in words is "twenty-two million, seven hundred twenty-nine thousand, six hundred forty-three".