2991218 has 8 divisors (see below), whose sum is σ = 4750812. Its totient is φ = 1407616.

The previous prime is 2991217. The next prime is 2991229. The reversal of 2991218 is 8121992.

It is a happy number.

2991218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2362369 + 628849 = 1537^2 + 793^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2991217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43955 + ... + 44022.

2^2991218 is an apocalyptic number.

2991218 is a deficient number, since it is larger than the sum of its proper divisors (1759594).

2991218 is a wasteful number, since it uses less digits than its factorization.

2991218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87996.

The product of its digits is 2592, while the sum is 32.

The square root of 2991218 is about 1729.5138045127. The cubic root of 2991218 is about 144.0840879762.

The spelling of 2991218 in words is "two million, nine hundred ninety-one thousand, two hundred eighteen".