3819681 has 12 divisors (see below), whose sum is σ = 5550480. Its totient is φ = 2531160.

The previous prime is 3819671. The next prime is 3819691. The reversal of 3819681 is 1869183.

It is an interprime number because it is at equal distance from previous prime (3819671) and next prime (3819691).

It is not a de Polignac number, because 3819681 - 2⁶ = 3819617 is a prime.

It is a super-2 number, since 2×3819681² = 29179925883522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3819631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 426 + ... + 2796.

It is an arithmetic number, because the mean of its divisors is an integer number (462540).

Almost surely, 2^3819681 is an apocalyptic number.

It is an amenable number.

3819681 is a deficient number, since it is larger than the sum of its proper divisors (1730799).

3819681 is a wasteful number, since it uses less digits than its factorization.

3819681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2556 (or 2553 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 3819681 is about 1954.4004195661. The cubic root of 3819681 is about 156.3180149757.

The spelling of 3819681 in words is "three million, eight hundred nineteen thousand, six hundred eighty-one".