2166424 has 32 divisors (see below), whose sum is σ = 4500720. Its totient is φ = 971136.

The previous prime is 2166419. The next prime is 2166427. The reversal of 2166424 is 4246612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3567 + ... + 4129.

2^2166424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2166424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2250360).

2166424 is an abundant number, since it is smaller than the sum of its proper divisors (2334296).

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

2166424 is a wasteful number, since it uses less digits than its factorization.

2166424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619 (or 615 counting only the distinct ones).

The product of its digits is 2304, while the sum is 25.

The square root of 2166424 is about 1471.8777123117. The cubic root of 2166424 is about 129.3941035370.

The spelling of 2166424 in words is "two million, one hundred sixty-six thousand, four hundred twenty-four".