3818891 has 8 divisors (see below), whose sum is σ = 3929664. Its totient is φ = 3709440.

The previous prime is 3818887. The next prime is 3818909. The reversal of 3818891 is 1988183.

3818891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3818891 - 2² = 3818887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3818831) 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 7 ways as a sum of consecutive naturals, for example, 8861 + ... + 9281.

It is an arithmetic number, because the mean of its divisors is an integer number (491208).

Almost surely, 2^3818891 is an apocalyptic number.

3818891 is a deficient number, since it is larger than the sum of its proper divisors (110773).

3818891 is a wasteful number, since it uses less digits than its factorization.

3818891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661.

The product of its digits is 13824, while the sum is 38.

The square root of 3818891 is about 1954.1983010943. The cubic root of 3818891 is about 156.3072374835.

The spelling of 3818891 in words is "three million, eight hundred eighteen thousand, eight hundred ninety-one".