18343328 has 24 divisors (see below), whose sum is σ = 37685088. Its totient is φ = 8772544.

The previous prime is 18343321. The next prime is 18343337. The reversal of 18343328 is 82334381.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 18343294 and 18343303.

It is not an unprimeable number, because it can be changed into a prime (18343321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11726 + ... + 13197.

It is an arithmetic number, because the mean of its divisors is an integer number (1570212).

Almost surely, 2^18343328 is an apocalyptic number.

It is an amenable number.

18343328 is an abundant number, since it is smaller than the sum of its proper divisors (19341760).

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

18343328 is a wasteful number, since it uses less digits than its factorization.

18343328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24956 (or 24948 counting only the distinct ones).

The product of its digits is 13824, while the sum is 32.

The square root of 18343328 is about 4282.9111594802. The cubic root of 18343328 is about 263.7299043560.

The spelling of 18343328 in words is "eighteen million, three hundred forty-three thousand, three hundred twenty-eight".