22749638 has 8 divisors (see below), whose sum is σ = 36131832. Its totient is φ = 10705696.

The previous prime is 22749611. The next prime is 22749679. The reversal of 22749638 is 83694722.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 22749595 and 22749604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334520 + ... + 334587.

It is an arithmetic number, because the mean of its divisors is an integer number (4516479).

Almost surely, 2^22749638 is an apocalyptic number.

22749638 is a deficient number, since it is larger than the sum of its proper divisors (13382194).

22749638 is a wasteful number, since it uses less digits than its factorization.

22749638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669126.

The product of its digits is 145152, while the sum is 41.

The square root of 22749638 is about 4769.6580590227. The cubic root of 22749638 is about 283.3510524866.

The spelling of 22749638 in words is "twenty-two million, seven hundred forty-nine thousand, six hundred thirty-eight".