22448643 has 16 divisors (see below), whose sum is σ = 34279680. Its totient is φ = 12800736.

The previous prime is 22448617. The next prime is 22448663. The reversal of 22448643 is 34684422.

It is a Cunningham number, because it is equal to 4738²-1.

It is not a de Polignac number, because 22448643 - 2⁵ = 22448611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22448663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13428 + ... + 15006.

It is an arithmetic number, because the mean of its divisors is an integer number (2142480).

Almost surely, 2^22448643 is an apocalyptic number.

22448643 is a deficient number, since it is larger than the sum of its proper divisors (11831037).

22448643 is a wasteful number, since it uses less digits than its factorization.

22448643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2266.

The product of its digits is 36864, while the sum is 33.

The square root of 22448643 is about 4737.9998944702. Note that the first 3 decimals coincide. The cubic root of 22448643 is about 282.0958504211.

The spelling of 22448643 in words is "twenty-two million, four hundred forty-eight thousand, six hundred forty-three".