3881819 has 4 divisors (see below), whose sum is σ = 3891720. Its totient is φ = 3871920.

The previous prime is 3881807. The next prime is 3881837. The reversal of 3881819 is 9181883.

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 3881819 - 2⁴ = 3881803 is a prime.

It is a super-2 number, since 2×3881819² = 30137037497522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3881849) 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, 4337 + ... + 5154.

It is an arithmetic number, because the mean of its divisors is an integer number (972930).

Almost surely, 2^3881819 is an apocalyptic number.

3881819 is a deficient number, since it is larger than the sum of its proper divisors (9901).

3881819 is an equidigital number, since it uses as much as digits as its factorization.

3881819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9900.

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

The square root of 3881819 is about 1970.2332349242. The cubic root of 3881819 is about 157.1611122830.

The spelling of 3881819 in words is "three million, eight hundred eighty-one thousand, eight hundred nineteen".