3823891 has 4 divisors (see below), whose sum is σ = 3881032. Its totient is φ = 3766752.

The previous prime is 3823889. The next prime is 3823901. The reversal of 3823891 is 1983283.

3823891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1983283 = 263 ⋅7541.

It is a cyclic number.

It is not a de Polignac number, because 3823891 - 2¹ = 3823889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3823801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28470 + ... + 28603.

It is an arithmetic number, because the mean of its divisors is an integer number (970258).

Almost surely, 2^3823891 is an apocalyptic number.

3823891 is a deficient number, since it is larger than the sum of its proper divisors (57141).

3823891 is an equidigital number, since it uses as much as digits as its factorization.

3823891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57140.

The product of its digits is 10368, while the sum is 34.

The square root of 3823891 is about 1955.4771796163. The cubic root of 3823891 is about 156.3754244128.

The spelling of 3823891 in words is "three million, eight hundred twenty-three thousand, eight hundred ninety-one".