2981668 has 12 divisors (see below), whose sum is σ = 5256972. Its totient is φ = 1479680.

The previous prime is 2981653. The next prime is 2981669. The reversal of 2981668 is 8661892.

It can be written as a sum of positive squares in 2 ways, for example, as 1965604 + 1016064 = 1402^2 + 1008^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2981668.

It is not an unprimeable number, because it can be changed into a prime (2981669) 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, 2173 + ... + 3268.

It is an arithmetic number, because the mean of its divisors is an integer number (438081).

2^2981668 is an apocalyptic number.

It is an amenable number.

2981668 is a deficient number, since it is larger than the sum of its proper divisors (2275304).

2981668 is a wasteful number, since it uses less digits than its factorization.

2981668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5582 (or 5580 counting only the distinct ones).

The product of its digits is 41472, while the sum is 40.

The square root of 2981668 is about 1726.7507058056. The cubic root of 2981668 is about 143.9305864013.

The spelling of 2981668 in words is "two million, nine hundred eighty-one thousand, six hundred sixty-eight".