22290346 has 8 divisors (see below), whose sum is σ = 36007524. Its totient is φ = 10287840.

The previous prime is 22290343. The next prime is 22290409. The reversal of 22290346 is 64309222.

It can be written as a sum of positive squares in 2 ways, for example, as 18584721 + 3705625 = 4311^2 + 1925^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (22290341) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 428635 + ... + 428686.

Almost surely, 2^22290346 is an apocalyptic number.

22290346 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

22290346 is a deficient number, since it is larger than the sum of its proper divisors (13717178).

22290346 is a wasteful number, since it uses less digits than its factorization.

22290346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857336.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 22290346 is about 4721.2652965069. The cubic root of 22290346 is about 281.4312177952.

Adding to 22290346 its reverse (64309222), we get a palindrome (86599568).

The spelling of 22290346 in words is "twenty-two million, two hundred ninety thousand, three hundred forty-six".