3881845 has 16 divisors (see below), whose sum is σ = 5124672. Its totient is φ = 2799360.

The previous prime is 3881837. The next prime is 3881849. The reversal of 3881845 is 5481883.

It is not a de Polignac number, because 3881845 - 2³ = 3881837 is a prime.

It is a Duffinian number.

3881845 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3881849) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8749 + ... + 9181.

It is an arithmetic number, because the mean of its divisors is an integer number (320292).

Almost surely, 2^3881845 is an apocalyptic number.

It is an amenable number.

3881845 is a deficient number, since it is larger than the sum of its proper divisors (1242827).

3881845 is a wasteful number, since it uses less digits than its factorization.

3881845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612.

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

The square root of 3881845 is about 1970.2398331168. The cubic root of 3881845 is about 157.1614631649.

The spelling of 3881845 in words is "three million, eight hundred eighty-one thousand, eight hundred forty-five".