18342688 has 48 divisors (see below), whose sum is σ = 44452800. Its totient is φ = 7255296.

The previous prime is 18342683. The next prime is 18342691. The reversal of 18342688 is 88624381.

It is a self number, because there is not a number n which added to its sum of digits gives 18342688.

It is not an unprimeable number, because it can be changed into a prime (18342683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 238 + ... + 6061.

It is an arithmetic number, because the mean of its divisors is an integer number (926100).

Almost surely, 2^18342688 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 18342688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22226400).

18342688 is an abundant number, since it is smaller than the sum of its proper divisors (26110112).

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

18342688 is a wasteful number, since it uses less digits than its factorization.

18342688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6329 (or 6321 counting only the distinct ones).

The product of its digits is 73728, while the sum is 40.

The square root of 18342688 is about 4282.8364432932. The cubic root of 18342688 is about 263.7268371354.

The spelling of 18342688 in words is "eighteen million, three hundred forty-two thousand, six hundred eighty-eight".