18282840 has 64 divisors (see below), whose sum is σ = 55157760. Its totient is φ = 4848000.

The previous prime is 18282833. The next prime is 18282841. The reversal of 18282840 is 4828281.

It is a super-3 number, since 3×18282840³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18282841) 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, 29817 + ... + 30423.

It is an arithmetic number, because the mean of its divisors is an integer number (861840).

Almost surely, 2^18282840 is an apocalyptic number.

18282840 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 18282840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27578880).

18282840 is an abundant number, since it is smaller than the sum of its proper divisors (36874920).

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

18282840 is a wasteful number, since it uses less digits than its factorization.

18282840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872 (or 868 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 33.

The square root of 18282840 is about 4275.8437763791. The cubic root of 18282840 is about 263.4396978142.

The spelling of 18282840 in words is "eighteen million, two hundred eighty-two thousand, eight hundred forty".