19228224 has 112 divisors (see below), whose sum is σ = 55522368. Its totient is φ = 5849088.

The previous prime is 19228211. The next prime is 19228229. The reversal of 19228224 is 42282291.

It is a Cunningham number, because it is equal to 4385²-1.

It is a junction number, because it is equal to n+sod(n) for n = 19228191 and 19228200.

It is not an unprimeable number, because it can be changed into a prime (19228229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140284 + ... + 140420.

Almost surely, 2^19228224 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 19228224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27761184).

19228224 is an abundant number, since it is smaller than the sum of its proper divisors (36294144).

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

19228224 is a wasteful number, since it uses less digits than its factorization.

19228224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212 (or 202 counting only the distinct ones).

The product of its digits is 4608, while the sum is 30.

The square root of 19228224 is about 4384.9998859749. Note that the first 3 decimals coincide. The cubic root of 19228224 is about 267.9043246512.

The spelling of 19228224 in words is "nineteen million, two hundred twenty-eight thousand, two hundred twenty-four".