2840003 has 12 divisors (see below), whose sum is σ = 3124032. Its totient is φ = 2578560.

The previous prime is 2839981. The next prime is 2840023. The reversal of 2840003 is 3000482.

It is not a de Polignac number, because 2840003 - 2⁶ = 2839939 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2840023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8801 + ... + 9117.

It is an arithmetic number, because the mean of its divisors is an integer number (260336).

2^2840003 is an apocalyptic number.

2840003 is a deficient number, since it is larger than the sum of its proper divisors (284029).

2840003 is a wasteful number, since it uses less digits than its factorization.

2840003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382 (or 365 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2840003 is about 1685.2308447213. The cubic root of 2840003 is about 141.6140248858.

Multiplying 2840003 by its sum of digits (17), we get a triangular number (48280051 = T₉₈₂₆).

Adding to 2840003 its reverse (3000482), we get a palindrome (5840485).

The spelling of 2840003 in words is "two million, eight hundred forty thousand, three".