18280328 has 32 divisors (see below), whose sum is σ = 38603520. Its totient is φ = 8040000.

The previous prime is 18280319. The next prime is 18280343. The reversal of 18280328 is 82308281.

It is a junction number, because it is equal to n+sod(n) for n = 18280294 and 18280303.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 623 + ... + 6078.

It is an arithmetic number, because the mean of its divisors is an integer number (1206360).

Almost surely, 2^18280328 is an apocalyptic number.

It is an amenable number.

18280328 is an abundant number, since it is smaller than the sum of its proper divisors (20323192).

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

18280328 is a wasteful number, since it uses less digits than its factorization.

18280328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6749 (or 6745 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 18280328 is about 4275.5500230964. The cubic root of 18280328 is about 263.4276320223.

The spelling of 18280328 in words is "eighteen million, two hundred eighty thousand, three hundred twenty-eight".