18328230 has 48 divisors (see below), whose sum is σ = 48825504. Its totient is φ = 4767360.

The previous prime is 18328201. The next prime is 18328231. The reversal of 18328230 is 3282381.

It is a junction number, because it is equal to n+sod(n) for n = 18328194 and 18328203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18328231) 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 23 ways as a sum of consecutive naturals, for example, 1207 + ... + 6173.

It is an arithmetic number, because the mean of its divisors is an integer number (1017198).

Almost surely, 2^18328230 is an apocalyptic number.

18328230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18328230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24412752).

18328230 is an abundant number, since it is smaller than the sum of its proper divisors (30497274).

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

18328230 is a wasteful number, since it uses less digits than its factorization.

18328230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5021 (or 5018 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 18328230 is about 4281.1482104688. The cubic root of 18328230 is about 263.6575276852.

The spelling of 18328230 in words is "eighteen million, three hundred twenty-eight thousand, two hundred thirty".