2168404 has 24 divisors (see below), whose sum is σ = 4440128. Its totient is φ = 907200.

The previous prime is 2168399. The next prime is 2168407. The reversal of 2168404 is 4048612.

2168404 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a pancake number, because a pancake can be divided into 2168404 parts by 2082 straight cuts.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2168407) 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, 304 + ... + 2104.

2^2168404 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 2168404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2220064).

2168404 is an abundant number, since it is smaller than the sum of its proper divisors (2271724).

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

2168404 is a wasteful number, since it uses less digits than its factorization.

2168404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1855 (or 1853 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 2168404 is about 1472.5501689246. The cubic root of 2168404 is about 129.4335113835.

The spelling of 2168404 in words is "two million, one hundred sixty-eight thousand, four hundred four".