2668444 has 24 divisors (see below), whose sum is σ = 4889808. Its totient is φ = 1272960.

The previous prime is 2668433. The next prime is 2668453. The reversal of 2668444 is 4448662.

It is a happy number.

It is a super-2 number, since 2×2668444² = 14241186762272, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹⁹ + 6³ + 6⁶ + 8⁷ + 4 + 4³ + 4³ .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8539 + ... + 8845.

It is an arithmetic number, because the mean of its divisors is an integer number (203742).

2^2668444 is an apocalyptic number.

It is an amenable number.

2668444 is a deficient number, since it is larger than the sum of its proper divisors (2221364).

2668444 is a wasteful number, since it uses less digits than its factorization.

2668444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405 (or 403 counting only the distinct ones).

The product of its digits is 36864, while the sum is 34.

The square root of 2668444 is about 1633.5372661804. The cubic root of 2668444 is about 138.7030563807.

The spelling of 2668444 in words is "two million, six hundred sixty-eight thousand, four hundred forty-four".