2815668 has 72 divisors (see below), whose sum is σ = 7804160. Its totient is φ = 876960.

The previous prime is 2815649. The next prime is 2815669. The reversal of 2815668 is 8665182.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2815669) 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 23 ways as a sum of consecutive naturals, for example, 90813 + ... + 90843.

2^2815668 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 2815668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3902080).

2815668 is an abundant number, since it is smaller than the sum of its proper divisors (4988492).

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

2815668 is a wasteful number, since it uses less digits than its factorization.

2815668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102 (or 65 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 2815668 is about 1677.9952324128. The cubic root of 2815668 is about 141.2083835943.

It can be divided in two parts, 28156 and 68, that added together give a square (28224 = 168²).

The spelling of 2815668 in words is "two million, eight hundred fifteen thousand, six hundred sixty-eight".