2840306 has 8 divisors (see below), whose sum is σ = 4869120. Its totient is φ = 1217268.

The previous prime is 2840303. The next prime is 2840353. The reversal of 2840306 is 6030482.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2840303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101426 + ... + 101453.

It is an arithmetic number, because the mean of its divisors is an integer number (608640).

2^2840306 is an apocalyptic number.

2840306 is a deficient number, since it is larger than the sum of its proper divisors (2028814).

2840306 is a wasteful number, since it uses less digits than its factorization.

2840306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202888.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 2840306 is about 1685.3207409867. The cubic root of 2840306 is about 141.6190609748.

Adding to 2840306 its reverse (6030482), we get a palindrome (8870788).

The spelling of 2840306 in words is "two million, eight hundred forty thousand, three hundred six".