22704638 has 16 divisors (see below), whose sum is σ = 37485936. Its totient is φ = 10227840.

The previous prime is 22704637. The next prime is 22704691. The reversal of 22704638 is 83640722.

It is a super-2 number, since 2×22704638² = 1031001173422088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22704631) 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, 2081 + ... + 7052.

It is an arithmetic number, because the mean of its divisors is an integer number (2342871).

Almost surely, 2^22704638 is an apocalyptic number.

22704638 is a deficient number, since it is larger than the sum of its proper divisors (14781298).

22704638 is a wasteful number, since it uses less digits than its factorization.

22704638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9259.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 22704638 is about 4764.9384046386. The cubic root of 22704638 is about 283.1641013233.

The spelling of 22704638 in words is "twenty-two million, seven hundred four thousand, six hundred thirty-eight".