2209490 has 32 divisors (see below), whose sum is σ = 4327344. Its totient is φ = 808960.

The previous prime is 2209483. The next prime is 2209499. The reversal of 2209490 is 949022.

2209490 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 201601 + 2007889 = 449^2 + 1417^2 .

It is not an unprimeable number, because it can be changed into a prime (2209499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6812 + ... + 7128.

2^2209490 is an apocalyptic number.

2209490 is a deficient number, since it is larger than the sum of its proper divisors (2117854).

2209490 is a wasteful number, since it uses less digits than its factorization.

2209490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 2209490 is about 1486.4353332722. The cubic root of 2209490 is about 130.2458857163.

The spelling of 2209490 in words is "two million, two hundred nine thousand, four hundred ninety".