22238688 has 48 divisors (see below), whose sum is σ = 59101056. Its totient is φ = 7320960.

The previous prime is 22238681. The next prime is 22238729. The reversal of 22238688 is 88683222.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×22238688² = 989118487922688, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22238681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6573 + ... + 9363.

It is an arithmetic number, because the mean of its divisors is an integer number (1231272).

Almost surely, 2^22238688 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 22238688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29550528).

22238688 is an abundant number, since it is smaller than the sum of its proper divisors (36862368).

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

22238688 is a wasteful number, since it uses less digits than its factorization.

22238688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2887 (or 2879 counting only the distinct ones).

The product of its digits is 73728, while the sum is 39.

The square root of 22238688 is about 4715.7913439846. The cubic root of 22238688 is about 281.2136434980.

The spelling of 22238688 in words is "twenty-two million, two hundred thirty-eight thousand, six hundred eighty-eight".