22729306 has 8 divisors (see below), whose sum is σ = 36099540. Its totient is φ = 10696128.

The previous prime is 22729297. The next prime is 22729307. The reversal of 22729306 is 60392722.

It can be written as a sum of positive squares in 2 ways, for example, as 22648081 + 81225 = 4759^2 + 285^2 .

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

It is not an unprimeable number, because it can be changed into a prime (22729307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334221 + ... + 334288.

Almost surely, 2^22729306 is an apocalyptic number.

22729306 is a deficient number, since it is larger than the sum of its proper divisors (13370234).

22729306 is a wasteful number, since it uses less digits than its factorization.

22729306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668528.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 22729306 is about 4767.5261929013. The cubic root of 22729306 is about 283.2666143557.

The spelling of 22729306 in words is "twenty-two million, seven hundred twenty-nine thousand, three hundred six".