2163684 has 12 divisors (see below), whose sum is σ = 5048624. Its totient is φ = 721224.

The previous prime is 2163677. The next prime is 2163691. The reversal of 2163684 is 4863612.

It is an interprime number because it is at equal distance from previous prime (2163677) and next prime (2163691).

It is a tau number, because it is divible by the number of its divisors (12).

It is a d-powerful number, because it can be written as 2²¹ + 1 + 6⁴ + 3⁷ + 6⁶ + 8 + 4⁷ .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90142 + ... + 90165.

2^2163684 is an apocalyptic number.

It is an amenable number.

2163684 is an abundant number, since it is smaller than the sum of its proper divisors (2884940).

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

2163684 is a wasteful number, since it uses less digits than its factorization.

2163684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180314 (or 180312 counting only the distinct ones).

The product of its digits is 6912, while the sum is 30.

The square root of 2163684 is about 1470.9466339742. The cubic root of 2163684 is about 129.3395298220.

The spelling of 2163684 in words is "two million, one hundred sixty-three thousand, six hundred eighty-four".