18327408 has 80 divisors (see below), whose sum is σ = 52306176. Its totient is φ = 5483520.

The previous prime is 18327383. The next prime is 18327409. The reversal of 18327408 is 80472381.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18327409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54216 + ... + 54552.

Almost surely, 2^18327408 is an apocalyptic number.

18327408 is the 2472-nd octagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18327408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26153088).

18327408 is an abundant number, since it is smaller than the sum of its proper divisors (33978768).

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

18327408 is a wasteful number, since it uses less digits than its factorization.

18327408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462 (or 456 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 18327408 is about 4281.0522071098. The cubic root of 18327408 is about 263.6535860475.

Adding to 18327408 its reverse (80472381), we get a palindrome (98799789).

The spelling of 18327408 in words is "eighteen million, three hundred twenty-seven thousand, four hundred eight".