18229008 has 80 divisors (see below), whose sum is σ = 54282240. Its totient is φ = 5163648.

The previous prime is 18228989. The next prime is 18229009. The reversal of 18229008 is 80092281.

It is a super-5 number, since 5×18229008⁵ (a number of 38 digits) contains 55555 as substring.

It is not an unprimeable number, because it can be changed into a prime (18229009) 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, 76153 + ... + 76391.

It is an arithmetic number, because the mean of its divisors is an integer number (678528).

Almost surely, 2^18229008 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 18229008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27141120).

18229008 is an abundant number, since it is smaller than the sum of its proper divisors (36053232).

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

18229008 is a wasteful number, since it uses less digits than its factorization.

18229008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484 (or 478 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 18229008 is about 4269.5442379720. The cubic root of 18229008 is about 263.1808863224.

The spelling of 18229008 in words is "eighteen million, two hundred twenty-nine thousand, eight".