18284328 has 24 divisors (see below), whose sum is σ = 49520250. Its totient is φ = 6094752.

The previous prime is 18284309. The next prime is 18284339. The reversal of 18284328 is 82348281.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 17791524 + 492804 = 4218^2 + 702^2 .

It is a tau number, because it is divible by the number of its divisors (24).

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 = 18284292 and 18284301.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 126903 + ... + 127046.

Almost surely, 2^18284328 is an apocalyptic number.

18284328 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18284328 is an abundant number, since it is smaller than the sum of its proper divisors (31235922).

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

18284328 is a wasteful number, since it uses less digits than its factorization.

18284328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253961 (or 253954 counting only the distinct ones).

The product of its digits is 24576, while the sum is 36.

The square root of 18284328 is about 4276.0177735833. The cubic root of 18284328 is about 263.4468445455.

The spelling of 18284328 in words is "eighteen million, two hundred eighty-four thousand, three hundred twenty-eight".