22022442 has 40 divisors (see below), whose sum is σ = 53147556. Its totient is φ = 6775488.

The previous prime is 22022417. The next prime is 22022447. The reversal of 22022442 is 24422022.

22022442 is a `hidden beast` number, since 220 + 2 + 2 + 442 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 21986721 + 35721 = 4689^2 + 189^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (22022447) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3123 + ... + 7334.

Almost surely, 2^22022442 is an apocalyptic number.

22022442 is an abundant number, since it is smaller than the sum of its proper divisors (31125114).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22022442 is a wasteful number, since it uses less digits than its factorization.

22022442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10484 (or 10475 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 22022442 is about 4692.8074752753. The cubic root of 22022442 is about 280.2991785148.

Adding to 22022442 its reverse (24422022), we get a palindrome (46444464).

The spelling of 22022442 in words is "twenty-two million, twenty-two thousand, four hundred forty-two".