22938649 has 4 divisors (see below), whose sum is σ = 22948900. Its totient is φ = 22928400.

The previous prime is 22938637. The next prime is 22938653. The reversal of 22938649 is 94683922.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 12730624 + 10208025 = 3568^2 + 3195^2 .

It is a cyclic number.

It is not a de Polignac number, because 22938649 - 2¹⁵ = 22905881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22938749) 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, 174 + ... + 6775.

It is an arithmetic number, because the mean of its divisors is an integer number (5737225).

Almost surely, 2^22938649 is an apocalyptic number.

It is an amenable number.

22938649 is a deficient number, since it is larger than the sum of its proper divisors (10251).

22938649 is an equidigital number, since it uses as much as digits as its factorization.

22938649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10250.

The product of its digits is 186624, while the sum is 43.

The square root of 22938649 is about 4789.4309682884. The cubic root of 22938649 is about 284.1336118313.

The spelling of 22938649 in words is "twenty-two million, nine hundred thirty-eight thousand, six hundred forty-nine".