18224208 has 60 divisors (see below), whose sum is σ = 51300288. Its totient is φ = 6039360.

The previous prime is 18224191. The next prime is 18224243. The reversal of 18224208 is 80242281.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38791 + ... + 39257.

Almost surely, 2^18224208 is an apocalyptic number.

18224208 is a gapful number since it is divisible by the number (18) 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 18224208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25650144).

18224208 is an abundant number, since it is smaller than the sum of its proper divisors (33076080).

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

18224208 is a wasteful number, since it uses less digits than its factorization.

18224208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752 (or 743 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 18224208 is about 4268.9820800748. The cubic root of 18224208 is about 263.1577843312.

Adding to 18224208 its reverse (80242281), we get a palindrome (98466489).

The spelling of 18224208 in words is "eighteen million, two hundred twenty-four thousand, two hundred eight".