18198528 has 52 divisors (see below), whose sum is σ = 48556248. Its totient is φ = 6062080.

The previous prime is 18198493. The next prime is 18198533. The reversal of 18198528 is 82589181.

It is a self number, because there is not a number n which added to its sum of digits gives 18198528.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11548 + ... + 13028.

It is an arithmetic number, because the mean of its divisors is an integer number (933774).

Almost surely, 2^18198528 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18198528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24278124).

18198528 is an abundant number, since it is smaller than the sum of its proper divisors (30357720).

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

18198528 is an equidigital number, since it uses as much as digits as its factorization.

18198528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1508 (or 1486 counting only the distinct ones).

The product of its digits is 46080, while the sum is 42.

The square root of 18198528 is about 4265.9732769908. The cubic root of 18198528 is about 263.0341197234.

The spelling of 18198528 in words is "eighteen million, one hundred ninety-eight thousand, five hundred twenty-eight".