2239666 has 32 divisors (see below), whose sum is σ = 4064256. Its totient is φ = 912000.

The previous prime is 2239651. The next prime is 2239667. The reversal of 2239666 is 6669322.

It is a super-2 number, since 2×2239666² = 10032207583112, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2⁵ + 2⁷ + 3² + 9 + 6⁷ + 6⁷ + 6⁸ .

It is not an unprimeable number, because it can be changed into a prime (2239667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11631 + ... + 11821.

It is an arithmetic number, because the mean of its divisors is an integer number (127008).

2^2239666 is an apocalyptic number.

2239666 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2239666 is a deficient number, since it is larger than the sum of its proper divisors (1824590).

2239666 is a wasteful number, since it uses less digits than its factorization.

2239666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258.

The product of its digits is 23328, while the sum is 34.

The square root of 2239666 is about 1496.5513689814. The cubic root of 2239666 is about 130.8361488929.

It can be divided in two parts, 223 and 9666, that added together give a palindrome (9889).

The spelling of 2239666 in words is "two million, two hundred thirty-nine thousand, six hundred sixty-six".