3845881 has 4 divisors (see below), whose sum is σ = 4141732. Its totient is φ = 3550032.

The previous prime is 3845873. The next prime is 3845887. The reversal of 3845881 is 1885483.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1010025 + 2835856 = 1005^2 + 1684^2 .

It is a cyclic number.

It is not a de Polignac number, because 3845881 - 2³ = 3845873 is a prime.

It is a super-2 number, since 2×3845881² = 29581601332322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3845881.

It is not an unprimeable number, because it can be changed into a prime (3845887) 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, 147906 + ... + 147931.

It is an arithmetic number, because the mean of its divisors is an integer number (1035433).

Almost surely, 2^3845881 is an apocalyptic number.

It is an amenable number.

3845881 is a deficient number, since it is larger than the sum of its proper divisors (295851).

3845881 is a wasteful number, since it uses less digits than its factorization.

3845881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295850.

The product of its digits is 30720, while the sum is 37.

The square root of 3845881 is about 1961.0917877550. The cubic root of 3845881 is about 156.6746070117.

The spelling of 3845881 in words is "three million, eight hundred forty-five thousand, eight hundred eighty-one".