22639859 has 4 divisors (see below), whose sum is σ = 24698040. Its totient is φ = 20581680.

The previous prime is 22639789. The next prime is 22639861. The reversal of 22639859 is 95893622.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22639859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22639879) 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, 1029074 + ... + 1029095.

It is an arithmetic number, because the mean of its divisors is an integer number (6174510).

Almost surely, 2^22639859 is an apocalyptic number.

22639859 is a deficient number, since it is larger than the sum of its proper divisors (2058181).

22639859 is a wasteful number, since it uses less digits than its factorization.

22639859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2058180.

The product of its digits is 233280, while the sum is 44.

The square root of 22639859 is about 4758.1360846449. The cubic root of 22639859 is about 282.8945446507.

The spelling of 22639859 in words is "twenty-two million, six hundred thirty-nine thousand, eight hundred fifty-nine".