22240642 has 4 divisors (see below), whose sum is σ = 33360966. Its totient is φ = 11120320.

The previous prime is 22240637. The next prime is 22240643. The reversal of 22240642 is 24604222.

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

It can be written as a sum of positive squares in only one way, i.e., 21706281 + 534361 = 4659^2 + 731^2 .

It is not an unprimeable number, because it can be changed into a prime (22240643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5560159 + ... + 5560162.

Almost surely, 2^22240642 is an apocalyptic number.

22240642 is a deficient number, since it is larger than the sum of its proper divisors (11120324).

22240642 is a wasteful number, since it uses less digits than its factorization.

22240642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11120323.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 22240642 is about 4715.9985156910. The cubic root of 22240642 is about 281.2218795259.

Adding to 22240642 its reverse (24604222), we get a palindrome (46844864).

The spelling of 22240642 in words is "twenty-two million, two hundred forty thousand, six hundred forty-two".