22009438 has 8 divisors (see below), whose sum is σ = 36015480. Its totient is φ = 10004280.

The previous prime is 22009423. The next prime is 22009439. The reversal of 22009438 is 83490022.

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

It is a super-2 number, since 2×22009438² = 968830722151688, which contains 22 as substring.

22009438 is a modest number, since divided by 9438 gives 22 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22009439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500193 + ... + 500236.

It is an arithmetic number, because the mean of its divisors is an integer number (4501935).

Almost surely, 2^22009438 is an apocalyptic number.

22009438 is a deficient number, since it is larger than the sum of its proper divisors (14006042).

22009438 is a wasteful number, since it uses less digits than its factorization.

22009438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000442.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 22009438 is about 4691.4217461234. The cubic root of 22009438 is about 280.2439964994.

The spelling of 22009438 in words is "twenty-two million, nine thousand, four hundred thirty-eight".