2818668 has 48 divisors (see below), whose sum is σ = 7154784. Its totient is φ = 860160.

The previous prime is 2818667. The next prime is 2818687. The reversal of 2818668 is 8668182.

It is not an unprimeable number, because it can be changed into a prime (2818661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8196 + ... + 8532.

It is an arithmetic number, because the mean of its divisors is an integer number (149058).

2^2818668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2818668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3577392).

2818668 is an abundant number, since it is smaller than the sum of its proper divisors (4336116).

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

2818668 is a wasteful number, since it uses less digits than its factorization.

2818668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402 (or 400 counting only the distinct ones).

The product of its digits is 36864, while the sum is 39.

The square root of 2818668 is about 1678.8889183028. Note that the first 3 decimals coincide. The cubic root of 2818668 is about 141.2585167287.

It can be divided in two parts, 2818 and 668, that added together give a triangular number (3486 = T₈₃).

The spelling of 2818668 in words is "two million, eight hundred eighteen thousand, six hundred sixty-eight".