22448645 has 8 divisors (see below), whose sum is σ = 27110904. Its totient is φ = 17843904.

The previous prime is 22448617. The next prime is 22448663. The reversal of 22448645 is 54684422.

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

It can be written as a sum of positive squares in 4 ways, for example, as 6584356 + 15864289 = 2566^2 + 3983^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22448645 - 2⁸ = 22448389 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13514 + ... + 15083.

It is an arithmetic number, because the mean of its divisors is an integer number (3388863).

Almost surely, 2^22448645 is an apocalyptic number.

It is an amenable number.

22448645 is a deficient number, since it is larger than the sum of its proper divisors (4662259).

22448645 is a wasteful number, since it uses less digits than its factorization.

22448645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28759.

The product of its digits is 61440, while the sum is 35.

The square root of 22448645 is about 4738.0001055298. Note that the first 3 decimals coincide. The cubic root of 22448645 is about 282.0958587986.

The spelling of 22448645 in words is "twenty-two million, four hundred forty-eight thousand, six hundred forty-five".