2840043 has 4 divisors (see below), whose sum is σ = 3786728. Its totient is φ = 1893360.

The previous prime is 2840041. The next prime is 2840059. The reversal of 2840043 is 3400482.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2840043 - 2¹ = 2840041 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2840041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 473338 + ... + 473343.

It is an arithmetic number, because the mean of its divisors is an integer number (946682).

2^2840043 is an apocalyptic number.

2840043 is a deficient number, since it is larger than the sum of its proper divisors (946685).

2840043 is an equidigital number, since it uses as much as digits as its factorization.

2840043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946684.

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

The square root of 2840043 is about 1685.2427124898. The cubic root of 2840043 is about 141.6146897365.

The spelling of 2840043 in words is "two million, eight hundred forty thousand, forty-three".