18224488 has 16 divisors (see below), whose sum is σ = 34402500. Its totient is φ = 9050496.

The previous prime is 18224449. The next prime is 18224491. The reversal of 18224488 is 88442281.

It can be written as a sum of positive squares in 2 ways, for example, as 17791524 + 432964 = 4218^2 + 658^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6453 + ... + 8836.

Almost surely, 2^18224488 is an apocalyptic number.

It is an amenable number.

18224488 is a deficient number, since it is larger than the sum of its proper divisors (16178012).

18224488 is a wasteful number, since it uses less digits than its factorization.

18224488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15444 (or 15440 counting only the distinct ones).

The product of its digits is 32768, while the sum is 37.

The square root of 18224488 is about 4269.0148746520. The cubic root of 18224488 is about 263.1591320587.

The spelling of 18224488 in words is "eighteen million, two hundred twenty-four thousand, four hundred eighty-eight".