2039866 has 12 divisors (see below), whose sum is σ = 3123162. Its totient is φ = 999224.

The previous prime is 2039857. The next prime is 2039867. The reversal of 2039866 is 6689302.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1256641 + 783225 = 1121^2 + 885^2 .

It is a super-2 number, since 2×2039866² = 8322106595912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2039867) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6816 + ... + 7108.

2^2039866 is an apocalyptic number.

2039866 is a deficient number, since it is larger than the sum of its proper divisors (1083296).

2039866 is an equidigital number, since it uses as much as digits as its factorization.

2039866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413 (or 354 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 2039866 is about 1428.2387755554. The cubic root of 2039866 is about 126.8237371265.

The spelling of 2039866 in words is "two million, thirty-nine thousand, eight hundred sixty-six".