2009646 has 24 divisors (see below), whose sum is σ = 4402944. Its totient is φ = 662400.

The previous prime is 2009639. The next prime is 2009647. The reversal of 2009646 is 6469002.

It is a super-3 number, since 3×2009646³ = 24348933508233354408, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2009647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1171 + ... + 2321.

It is an arithmetic number, because the mean of its divisors is an integer number (183456).

2^2009646 is an apocalyptic number.

2009646 is an abundant number, since it is smaller than the sum of its proper divisors (2393298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2009646 is a wasteful number, since it uses less digits than its factorization.

2009646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256 (or 1253 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 2009646 is about 1417.6198362043. The cubic root of 2009646 is about 126.1943335285.

The spelling of 2009646 in words is "two million, nine thousand, six hundred forty-six".