3806881 has 4 divisors (see below), whose sum is σ = 4099732. Its totient is φ = 3514032.

The previous prime is 3806867. The next prime is 3806903. The reversal of 3806881 is 1886083.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1886083 = 113 ⋅16691.

It can be written as a sum of positive squares in 2 ways, for example, as 1846881 + 1960000 = 1359^2 + 1400^2 .

It is a cyclic number.

It is not a de Polignac number, because 3806881 - 2⁵ = 3806849 is a prime.

It is a super-2 number, since 2×3806881² = 28984685896322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3806851) 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, 146406 + ... + 146431.

It is an arithmetic number, because the mean of its divisors is an integer number (1024933).

Almost surely, 2^3806881 is an apocalyptic number.

It is an amenable number.

3806881 is a deficient number, since it is larger than the sum of its proper divisors (292851).

3806881 is a wasteful number, since it uses less digits than its factorization.

3806881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292850.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 3806881 is about 1951.1230099612. The cubic root of 3806881 is about 156.1432089489.

It can be divided in two parts, 380688 and 1, that added together give a square (380689 = 617²).

The spelling of 3806881 in words is "three million, eight hundred six thousand, eight hundred eighty-one".