2166368 has 12 divisors (see below), whose sum is σ = 4265100. Its totient is φ = 1083168.

The previous prime is 2166319. The next prime is 2166403. The reversal of 2166368 is 8636612.

It is a super-2 number, since 2×2166368² = 9386300622848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 67699 = 2166368 / (2 + 1 + 6 + 6 + 3 + 6 + 8).

It is a congruent number.

It is an unprimeable number.

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, 33818 + ... + 33881.

It is an arithmetic number, because the mean of its divisors is an integer number (355425).

2^2166368 is an apocalyptic number.

It is an amenable number.

2166368 is a deficient number, since it is larger than the sum of its proper divisors (2098732).

2166368 is an equidigital number, since it uses as much as digits as its factorization.

2166368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67709 (or 67701 counting only the distinct ones).

The product of its digits is 10368, while the sum is 32.

The square root of 2166368 is about 1471.8586888693. The cubic root of 2166368 is about 129.3929886226.

The spelling of 2166368 in words is "two million, one hundred sixty-six thousand, three hundred sixty-eight".