3818581 has 8 divisors (see below), whose sum is σ = 4163040. Its totient is φ = 3481392.

The previous prime is 3818561. The next prime is 3818587. The reversal of 3818581 is 1858183.

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 3818581 - 2¹⁹ = 3294293 is a prime.

It is a super-2 number, since 2×3818581² = 29163121707122, 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 (3818587) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 691 + ... + 2848.

It is an arithmetic number, because the mean of its divisors is an integer number (520380).

Almost surely, 2^3818581 is an apocalyptic number.

It is an amenable number.

3818581 is a deficient number, since it is larger than the sum of its proper divisors (344459).

3818581 is a wasteful number, since it uses less digits than its factorization.

3818581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3635.

The product of its digits is 7680, while the sum is 34.

The square root of 3818581 is about 1954.1189830714. The cubic root of 3818581 is about 156.3030079350.

The spelling of 3818581 in words is "three million, eight hundred eighteen thousand, five hundred eighty-one".