2205690 has 16 divisors (see below), whose sum is σ = 5293728. Its totient is φ = 588176.

The previous prime is 2205667. The next prime is 2205703. The reversal of 2205690 is 965022.

It is a super-2 number, since 2×2205690² = 9730136752200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2205690.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36732 + ... + 36791.

It is an arithmetic number, because the mean of its divisors is an integer number (330858).

2^2205690 is an apocalyptic number.

2205690 is an abundant number, since it is smaller than the sum of its proper divisors (3088038).

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

2205690 is a wasteful number, since it uses less digits than its factorization.

2205690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73533.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 2205690 is about 1485.1565574040. The cubic root of 2205690 is about 130.1711749044.

The spelling of 2205690 in words is "two million, two hundred five thousand, six hundred ninety".