18383328 has 48 divisors (see below), whose sum is σ = 53620560. Its totient is φ = 6127488.

The previous prime is 18383327. The next prime is 18383333. The reversal of 18383328 is 82338381.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 18383292 and 18383301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18383327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9775 + ... + 11502.

It is an arithmetic number, because the mean of its divisors is an integer number (1117095).

Almost surely, 2^18383328 is an apocalyptic number.

18383328 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18383328 is an abundant number, since it is smaller than the sum of its proper divisors (35237232).

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

18383328 is a wasteful number, since it uses less digits than its factorization.

18383328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21296 (or 21282 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 18383328 is about 4287.5783374768. The cubic root of 18383328 is about 263.9214642425.

The spelling of 18383328 in words is "eighteen million, three hundred eighty-three thousand, three hundred twenty-eight".