2193816 has 64 divisors (see below), whose sum is σ = 6134400. Its totient is φ = 649728.

The previous prime is 2193803. The next prime is 2193827. The reversal of 2193816 is 6183912.

Its product of digits (2592) is a multiple of the sum of its prime divisors (324).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7611 + ... + 7893.

It is an arithmetic number, because the mean of its divisors is an integer number (95850).

2^2193816 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 2193816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3067200).

2193816 is an abundant number, since it is smaller than the sum of its proper divisors (3940584).

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

2193816 is a wasteful number, since it uses less digits than its factorization.

2193816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328 (or 324 counting only the distinct ones).

The product of its digits is 2592, while the sum is 30.

The square root of 2193816 is about 1481.1536044584. The cubic root of 2193816 is about 129.9371688486.

The spelling of 2193816 in words is "two million, one hundred ninety-three thousand, eight hundred sixteen".