22199472 has 60 divisors (see below), whose sum is σ = 64144704. Its totient is φ = 7159680.

The previous prime is 22199431. The next prime is 22199479. The reversal of 22199472 is 27499122.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (22199479) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1978 + ... + 6950.

Almost surely, 2^22199472 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 22199472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32072352).

22199472 is an abundant number, since it is smaller than the sum of its proper divisors (41945232).

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

22199472 is a wasteful number, since it uses less digits than its factorization.

22199472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5018 (or 5009 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 22199472 is about 4711.6315645432. The cubic root of 22199472 is about 281.0482476055.

The spelling of 22199472 in words is "twenty-two million, one hundred ninety-nine thousand, four hundred seventy-two".