2168444 has 6 divisors (see below), whose sum is σ = 3794784. Its totient is φ = 1084220.

The previous prime is 2168437. The next prime is 2168473. The reversal of 2168444 is 4448612.

It is a super-2 number, since 2×2168444² = 9404298762272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271052 + ... + 271059.

It is an arithmetic number, because the mean of its divisors is an integer number (632464).

2^2168444 is an apocalyptic number.

It is an amenable number.

2168444 is a deficient number, since it is larger than the sum of its proper divisors (1626340).

2168444 is a wasteful number, since it uses less digits than its factorization.

2168444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542115 (or 542113 counting only the distinct ones).

The product of its digits is 6144, while the sum is 29.

The square root of 2168444 is about 1472.5637507422. The cubic root of 2168444 is about 129.4343072544.

The spelling of 2168444 in words is "two million, one hundred sixty-eight thousand, four hundred forty-four".