2840806 has 4 divisors (see below), whose sum is σ = 4261212. Its totient is φ = 1420402.

The previous prime is 2840801. The next prime is 2840857. The reversal of 2840806 is 6080482.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6080482 = 2 ⋅3040241.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2840801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710200 + ... + 710203.

It is an arithmetic number, because the mean of its divisors is an integer number (1065303).

2^2840806 is an apocalyptic number.

2840806 is a deficient number, since it is larger than the sum of its proper divisors (1420406).

2840806 is a wasteful number, since it uses less digits than its factorization.

2840806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1420405.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 2840806 is about 1685.4690741749. The cubic root of 2840806 is about 141.6273705696.

The spelling of 2840806 in words is "two million, eight hundred forty thousand, eight hundred six".