2193804 has 72 divisors (see below), whose sum is σ = 6003088. Its totient is φ = 699840.

The previous prime is 2193803. The next prime is 2193827. The reversal of 2193804 is 4083912.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2193803) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35934 + ... + 35994.

2^2193804 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 2193804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3001544).

2193804 is an abundant number, since it is smaller than the sum of its proper divisors (3809284).

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

2193804 is a wasteful number, since it uses less digits than its factorization.

2193804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117 (or 103 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 2193804 is about 1481.1495535563. The cubic root of 2193804 is about 129.9369319328.

The spelling of 2193804 in words is "two million, one hundred ninety-three thousand, eight hundred four".