2887209 has 12 divisors (see below), whose sum is σ = 4491396. Its totient is φ = 1776672.

The previous prime is 2887207. The next prime is 2887217. The reversal of 2887209 is 9027882.

It can be written as a sum of positive squares in 2 ways, for example, as 1440000 + 1447209 = 1200^2 + 1203^2 .

It is not a de Polignac number, because 2887209 - 2¹ = 2887207 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2887201) 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, 12222 + ... + 12455.

It is an arithmetic number, because the mean of its divisors is an integer number (374283).

2^2887209 is an apocalyptic number.

It is an amenable number.

2887209 is a deficient number, since it is larger than the sum of its proper divisors (1604187).

2887209 is a wasteful number, since it uses less digits than its factorization.

2887209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24696 (or 24693 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 2887209 is about 1699.1789193608. The cubic root of 2887209 is about 142.3943445814.

The spelling of 2887209 in words is "two million, eight hundred eighty-seven thousand, two hundred nine".