18528340 has 48 divisors (see below), whose sum is σ = 41513472. Its totient is φ = 6930176.

The previous prime is 18528331. The next prime is 18528343. The reversal of 18528340 is 4382581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18528343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21192 + ... + 22048.

It is an arithmetic number, because the mean of its divisors is an integer number (864864).

Almost surely, 2^18528340 is an apocalyptic number.

18528340 is a gapful number since it is divisible by the number (10) 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 18528340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20756736).

18528340 is an abundant number, since it is smaller than the sum of its proper divisors (22985132).

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

18528340 is a wasteful number, since it uses less digits than its factorization.

18528340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936 (or 934 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 18528340 is about 4304.4558308804. The cubic root of 18528340 is about 264.6136056186.

The spelling of 18528340 in words is "eighteen million, five hundred twenty-eight thousand, three hundred forty".