3818381 has 4 divisors (see below), whose sum is σ = 4363872. Its totient is φ = 3272892.

The previous prime is 3818369. The next prime is 3818389. The reversal of 3818381 is 1838183.

3818381 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 3818381 - 2⁶ = 3818317 is a prime.

It is a super-2 number, since 2×3818381² = 29160066922322, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3818389) 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, 272735 + ... + 272748.

It is an arithmetic number, because the mean of its divisors is an integer number (1090968).

Almost surely, 2^3818381 is an apocalyptic number.

It is an amenable number.

3818381 is a deficient number, since it is larger than the sum of its proper divisors (545491).

3818381 is an equidigital number, since it uses as much as digits as its factorization.

3818381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545490.

The product of its digits is 4608, while the sum is 32.

The square root of 3818381 is about 1954.0678084447. The cubic root of 3818381 is about 156.3002790725.

The spelling of 3818381 in words is "three million, eight hundred eighteen thousand, three hundred eighty-one".