3857881 has 4 divisors (see below), whose sum is σ = 3867264. Its totient is φ = 3848500.

The previous prime is 3857873. The next prime is 3857891. The reversal of 3857881 is 1887583.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1887583 = 521 ⋅3623.

It is a cyclic number.

It is not a de Polignac number, because 3857881 - 2³ = 3857873 is a prime.

It is a super-2 number, since 2×3857881² = 29766491620322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3857801) 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, 4045 + ... + 4906.

It is an arithmetic number, because the mean of its divisors is an integer number (966816).

Almost surely, 2^3857881 is an apocalyptic number.

It is an amenable number.

3857881 is a deficient number, since it is larger than the sum of its proper divisors (9383).

3857881 is an equidigital number, since it uses as much as digits as its factorization.

3857881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9382.

The product of its digits is 53760, while the sum is 40.

The square root of 3857881 is about 1964.1489251073. The cubic root of 3857881 is about 156.8373909727.

The spelling of 3857881 in words is "three million, eight hundred fifty-seven thousand, eight hundred eighty-one".