2043840 has 56 divisors (see below), whose sum is σ = 6492240. Its totient is φ = 544768.

The previous prime is 2043817. The next prime is 2043841. The reversal of 2043840 is 483402.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2043841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105 + ... + 2024.

2^2043840 is an apocalyptic number.

2043840 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 2043840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3246120).

2043840 is an abundant number, since it is smaller than the sum of its proper divisors (4448400).

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

2043840 is a wasteful number, since it uses less digits than its factorization.

2043840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2149 (or 2139 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 2043840 is about 1429.6293225868. The cubic root of 2043840 is about 126.9060416495.

The spelling of 2043840 in words is "two million, forty-three thousand, eight hundred forty".