1818120 has 64 divisors (see below), whose sum is σ = 5544000. Its totient is φ = 476928.

The previous prime is 1818109. The next prime is 1818151. The reversal of 1818120 is 218181.

It is a congruent number.

It is an unprimeable number.

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, 13011 + ... + 13149.

It is an arithmetic number, because the mean of its divisors is an integer number (86625).

2^1818120 is an apocalyptic number.

1818120 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 1818120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2772000).

1818120 is an abundant number, since it is smaller than the sum of its proper divisors (3725880).

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

1818120 is a wasteful number, since it uses less digits than its factorization.

1818120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262 (or 258 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 21.

The square root of 1818120 is about 1348.3768019363. The cubic root of 1818120 is about 122.0508611726.

The spelling of 1818120 in words is "one million, eight hundred eighteen thousand, one hundred twenty".