22639855 has 16 divisors (see below), whose sum is σ = 31477824. Its totient is φ = 15310080.

The previous prime is 22639789. The next prime is 22639861. The reversal of 22639855 is 55893622.

22639855 = 1940² + 1941² + ... + 1945².

It is not a de Polignac number, because 22639855 - 2¹¹ = 22637807 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1876 + ... + 6985.

It is an arithmetic number, because the mean of its divisors is an integer number (1967364).

Almost surely, 2^22639855 is an apocalyptic number.

22639855 is a deficient number, since it is larger than the sum of its proper divisors (8837969).

22639855 is an equidigital number, since it uses as much as digits as its factorization.

22639855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8946.

The product of its digits is 129600, while the sum is 40.

The square root of 22639855 is about 4758.1356643122. The cubic root of 22639855 is about 282.8945279901.

The spelling of 22639855 in words is "twenty-two million, six hundred thirty-nine thousand, eight hundred fifty-five".