2170684 has 12 divisors (see below), whose sum is σ = 3829504. Its totient is φ = 1076544.

The previous prime is 2170681. The next prime is 2170697. The reversal of 2170684 is 4860712.

2170684 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2170681) 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, 1629 + ... + 2644.

2^2170684 is an apocalyptic number.

It is an amenable number.

2170684 is a deficient number, since it is larger than the sum of its proper divisors (1658820).

2170684 is a wasteful number, since it uses less digits than its factorization.

2170684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4404 (or 4402 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 2170684 is about 1473.3241327013. The cubic root of 2170684 is about 129.4788604105.

Adding to 2170684 its sum of digits (28), we get a palindrome (2170712).

The spelling of 2170684 in words is "two million, one hundred seventy thousand, six hundred eighty-four".