18288238 has 8 divisors (see below), whose sum is σ = 27684360. Its totient is φ = 9060120.

The previous prime is 18288211. The next prime is 18288247. The reversal of 18288238 is 83288281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 18288238.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 41728 + ... + 42163.

It is an arithmetic number, because the mean of its divisors is an integer number (3460545).

Almost surely, 2^18288238 is an apocalyptic number.

18288238 is a deficient number, since it is larger than the sum of its proper divisors (9396122).

18288238 is a wasteful number, since it uses less digits than its factorization.

18288238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84002.

The product of its digits is 49152, while the sum is 40.

The square root of 18288238 is about 4276.4749502365. The cubic root of 18288238 is about 263.4656220791.

The spelling of 18288238 in words is "eighteen million, two hundred eighty-eight thousand, two hundred thirty-eight".