3840891 has 4 divisors (see below), whose sum is σ = 5121192. Its totient is φ = 2560592.

The previous prime is 3840853. The next prime is 3840911. The reversal of 3840891 is 1980483.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3840891 - 2¹⁷ = 3709819 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (3840821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 640146 + ... + 640151.

It is an arithmetic number, because the mean of its divisors is an integer number (1280298).

Almost surely, 2^3840891 is an apocalyptic number.

3840891 is a deficient number, since it is larger than the sum of its proper divisors (1280301).

3840891 is a wasteful number, since it uses less digits than its factorization.

3840891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280300.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 3840891 is about 1959.8191243071. The cubic root of 3840891 is about 156.6068163319.

The spelling of 3840891 in words is "three million, eight hundred forty thousand, eight hundred ninety-one".