2009090 has 8 divisors (see below), whose sum is σ = 3616380. Its totient is φ = 803632.

The previous prime is 2009083. The next prime is 2009093. The reversal of 2009090 is 909002.

It can be written as a sum of positive squares in 2 ways, for example, as 1857769 + 151321 = 1363^2 + 389^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

2009090 is a modest number, since divided by 9090 gives 200 as remainder.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2009093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100445 + ... + 100464.

2^2009090 is an apocalyptic number.

2009090 is a deficient number, since it is larger than the sum of its proper divisors (1607290).

2009090 is a wasteful number, since it uses less digits than its factorization.

2009090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200916.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 2009090 is about 1417.4237192879. The cubic root of 2009090 is about 126.1826945763.

The spelling of 2009090 in words is "two million, nine thousand, ninety".