22208472 has 128 divisors (see below), whose sum is σ = 72576000. Its totient is φ = 6203520.

The previous prime is 22208449. The next prime is 22208479. The reversal of 22208472 is 27480222.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22208479) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30529 + ... + 31247.

It is an arithmetic number, because the mean of its divisors is an integer number (567000).

Almost surely, 2^22208472 is an apocalyptic number.

22208472 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22208472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36288000).

22208472 is an abundant number, since it is smaller than the sum of its proper divisors (50367528).

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

22208472 is a wasteful number, since it uses less digits than its factorization.

22208472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758 (or 748 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 22208472 is about 4712.5865509293. The cubic root of 22208472 is about 281.0862228703.

Adding to 22208472 its reverse (27480222), we get a palindrome (49688694).

The spelling of 22208472 in words is "twenty-two million, two hundred eight thousand, four hundred seventy-two".