22638379 has 4 divisors (see below), whose sum is σ = 22720384. Its totient is φ = 22556376.

The previous prime is 22638377. The next prime is 22638389. The reversal of 22638379 is 97383622.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22638379 - 2¹ = 22638377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22638377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40587 + ... + 41140.

It is an arithmetic number, because the mean of its divisors is an integer number (5680096).

Almost surely, 2^22638379 is an apocalyptic number.

22638379 is a deficient number, since it is larger than the sum of its proper divisors (82005).

22638379 is an equidigital number, since it uses as much as digits as its factorization.

22638379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82004.

The product of its digits is 108864, while the sum is 40.

The square root of 22638379 is about 4757.9805590187. The cubic root of 22638379 is about 282.8883801092. Note that the first 3 decimals are identical.

It can be divided in two parts, 22 and 638379, that added together give a square (638401 = 799²).

The spelling of 22638379 in words is "twenty-two million, six hundred thirty-eight thousand, three hundred seventy-nine".