22390242 has 32 divisors (see below), whose sum is σ = 51397632. Its totient is φ = 6369744.

The previous prime is 22390213. The next prime is 22390253. The reversal of 22390242 is 24209322.

22390242 is nontrivially palindromic in base 13.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10033 + ... + 12059.

It is an arithmetic number, because the mean of its divisors is an integer number (1606176).

Almost surely, 2^22390242 is an apocalyptic number.

22390242 is an abundant number, since it is smaller than the sum of its proper divisors (29007390).

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

22390242 is a wasteful number, since it uses less digits than its factorization.

22390242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2302.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 22390242 is about 4731.8328372841. The cubic root of 22390242 is about 281.8510102772.

Adding to 22390242 its reverse (24209322), we get a palindrome (46599564).

The spelling of 22390242 in words is "twenty-two million, three hundred ninety thousand, two hundred forty-two".