18008304 has 80 divisors (see below), whose sum is σ = 51023520. Its totient is φ = 5447680.

The previous prime is 18008293. The next prime is 18008311. The reversal of 18008304 is 40380081.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23284 + ... + 24044.

It is an arithmetic number, because the mean of its divisors is an integer number (637794).

Almost surely, 2^18008304 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 18008304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25511760).

18008304 is an abundant number, since it is smaller than the sum of its proper divisors (33015216).

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

18008304 is a wasteful number, since it uses less digits than its factorization.

18008304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818 (or 812 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 18008304 is about 4243.6192100611. The cubic root of 18008304 is about 262.1144344038.

Adding to 18008304 its reverse (40380081), we get a palindrome (58388385).

The spelling of 18008304 in words is "eighteen million, eight thousand, three hundred four".