2018840 has 32 divisors (see below), whose sum is σ = 4656960. Its totient is φ = 787200.

The previous prime is 2018837. The next prime is 2018843. The reversal of 2018840 is 488102.

It is an interprime number because it is at equal distance from previous prime (2018837) and next prime (2018843).

It is a Smith number, since the sum of its digits (23) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2018843) 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 7 ways as a sum of consecutive naturals, for example, 1025 + ... + 2255.

It is an arithmetic number, because the mean of its divisors is an integer number (145530).

2^2018840 is an apocalyptic number.

2018840 is a gapful number since it is divisible by the number (20) 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 2018840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2328480).

2018840 is an abundant number, since it is smaller than the sum of its proper divisors (2638120).

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

2018840 is a wasteful number, since it uses less digits than its factorization.

2018840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1283 (or 1279 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 2018840 is about 1420.8588951757. The cubic root of 2018840 is about 126.3864844279.

The spelling of 2018840 in words is "two million, eighteen thousand, eight hundred forty".