22249968 has 80 divisors (see below), whose sum is σ = 62558496. Its totient is φ = 6773760.

The previous prime is 22249967. The next prime is 22249973. The reversal of 22249968 is 86994222.

It is a super-2 number, since 2×22249968² = 990122152002048, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22249961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112846 + ... + 113042.

Almost surely, 2^22249968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22249968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31279248).

22249968 is an abundant number, since it is smaller than the sum of its proper divisors (40308528).

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

22249968 is a wasteful number, since it uses less digits than its factorization.

22249968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402 (or 396 counting only the distinct ones).

The product of its digits is 124416, while the sum is 42.

The square root of 22249968 is about 4716.9871740339. The cubic root of 22249968 is about 281.2611815801.

The spelling of 22249968 in words is "twenty-two million, two hundred forty-nine thousand, nine hundred sixty-eight".