22304638 has 8 divisors (see below), whose sum is σ = 33788520. Its totient is φ = 11041800.

The previous prime is 22304617. The next prime is 22304647. The reversal of 22304638 is 83640322.

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

It is a super-2 number, since 2×22304638² = 994993752622088, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55008 + ... + 55411.

It is an arithmetic number, because the mean of its divisors is an integer number (4223565).

Almost surely, 2^22304638 is an apocalyptic number.

22304638 is a deficient number, since it is larger than the sum of its proper divisors (11483882).

22304638 is a wasteful number, since it uses less digits than its factorization.

22304638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110522.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 22304638 is about 4722.7786312721. The cubic root of 22304638 is about 281.4913537785.

It can be divided in two parts, 223046 and 38, that multiplied together give a palindrome (8475748).

The spelling of 22304638 in words is "twenty-two million, three hundred four thousand, six hundred thirty-eight".