22288442 has 24 divisors (see below), whose sum is σ = 37946496. Its totient is φ = 9801000.

The previous prime is 22288439. The next prime is 22288447. The reversal of 22288442 is 24488222.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 22288399 and 22288408.

It is not an unprimeable number, because it can be changed into a prime (22288447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6017 + ... + 8987.

It is an arithmetic number, because the mean of its divisors is an integer number (1581104).

Almost surely, 2^22288442 is an apocalyptic number.

22288442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

22288442 is a deficient number, since it is larger than the sum of its proper divisors (15658054).

22288442 is a wasteful number, since it uses less digits than its factorization.

22288442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3026 (or 3015 counting only the distinct ones).

The product of its digits is 16384, while the sum is 32.

The square root of 22288442 is about 4721.0636513396. The cubic root of 22288442 is about 281.4232044562.

The spelling of 22288442 in words is "twenty-two million, two hundred eighty-eight thousand, four hundred forty-two".