2213786 has 8 divisors (see below), whose sum is σ = 3358260. Its totient is φ = 1094368.

The previous prime is 2213759. The next prime is 2213789. The reversal of 2213786 is 6873122.

2213786 = 424² + 425² + ... + 435².

It is a happy number.

2213786 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 2 ways, for example, as 1771561 + 442225 = 1331^2 + 665^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2213789) 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 3 ways as a sum of consecutive naturals, for example, 6041 + ... + 6396.

2^2213786 is an apocalyptic number.

2213786 is a deficient number, since it is larger than the sum of its proper divisors (1144474).

2213786 is a wasteful number, since it uses less digits than its factorization.

2213786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12528.

The product of its digits is 4032, while the sum is 29.

The square root of 2213786 is about 1487.8796994381. The cubic root of 2213786 is about 130.3302451648.

The spelling of 2213786 in words is "two million, two hundred thirteen thousand, seven hundred eighty-six".