2191838 has 16 divisors (see below), whose sum is σ = 3642624. Its totient is φ = 980760.

The previous prime is 2191823. The next prime is 2191873. The reversal of 2191838 is 8381912.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 731 + ... + 2217.

It is an arithmetic number, because the mean of its divisors is an integer number (227664).

2^2191838 is an apocalyptic number.

2191838 is a deficient number, since it is larger than the sum of its proper divisors (1450786).

2191838 is a wasteful number, since it uses less digits than its factorization.

2191838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1567.

The product of its digits is 3456, while the sum is 32.

The square root of 2191838 is about 1480.4857311031. The cubic root of 2191838 is about 129.8981055600.

The spelling of 2191838 in words is "two million, one hundred ninety-one thousand, eight hundred thirty-eight".