22228742 has 4 divisors (see below), whose sum is σ = 33343116. Its totient is φ = 11114370.

The previous prime is 22228709. The next prime is 22228747. The reversal of 22228742 is 24782222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24782222 = 2 ⋅12391111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22228747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5557184 + ... + 5557187.

It is an arithmetic number, because the mean of its divisors is an integer number (8335779).

Almost surely, 2^22228742 is an apocalyptic number.

22228742 is a deficient number, since it is larger than the sum of its proper divisors (11114374).

22228742 is a wasteful number, since it uses less digits than its factorization.

22228742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11114373.

The product of its digits is 7168, while the sum is 29.

The square root of 22228742 is about 4714.7366840578. The cubic root of 22228742 is about 281.1717140465.

The spelling of 22228742 in words is "twenty-two million, two hundred twenty-eight thousand, seven hundred forty-two".