2622866 has 4 divisors (see below), whose sum is σ = 3934302. Its totient is φ = 1311432.

The previous prime is 2622863. The next prime is 2622889. The reversal of 2622866 is 6682262.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2608225 + 14641 = 1615^2 + 121^2 .

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2622863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655715 + ... + 655718.

2^2622866 is an apocalyptic number.

2622866 is a deficient number, since it is larger than the sum of its proper divisors (1311436).

2622866 is a wasteful number, since it uses less digits than its factorization.

2622866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311435.

The product of its digits is 13824, while the sum is 32.

The square root of 2622866 is about 1619.5264740041. The cubic root of 2622866 is about 137.9088174518.

The spelling of 2622866 in words is "two million, six hundred twenty-two thousand, eight hundred sixty-six".