18869328 has 80 divisors (see below), whose sum is σ = 55948800. Its totient is φ = 6082560.

The previous prime is 18869311. The next prime is 18869329. The reversal of 18869328 is 82396881.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18869329) 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 15 ways as a sum of consecutive naturals, for example, 12688 + ... + 14096.

It is an arithmetic number, because the mean of its divisors is an integer number (699360).

Almost surely, 2^18869328 is an apocalyptic number.

18869328 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18869328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27974400).

18869328 is an abundant number, since it is smaller than the sum of its proper divisors (37079472).

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

18869328 is a wasteful number, since it uses less digits than its factorization.

18869328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1457 (or 1445 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 18869328 is about 4343.8839763511. The cubic root of 18869328 is about 266.2270283692.

The spelling of 18869328 in words is "eighteen million, eight hundred sixty-nine thousand, three hundred twenty-eight".