3865885 has 8 divisors (see below), whose sum is σ = 4912056. Its totient is φ = 2910720.

The previous prime is 3865877. The next prime is 3865889. The reversal of 3865885 is 5885683.

It can be written as a sum of positive squares in 4 ways, for example, as 75076 + 3790809 = 274^2 + 1947^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3865885 - 2³ = 3865877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3865889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22656 + ... + 22825.

It is an arithmetic number, because the mean of its divisors is an integer number (614007).

Almost surely, 2^3865885 is an apocalyptic number.

It is an amenable number.

3865885 is a deficient number, since it is larger than the sum of its proper divisors (1046171).

3865885 is a wasteful number, since it uses less digits than its factorization.

3865885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45503.

The product of its digits is 230400, while the sum is 43.

The square root of 3865885 is about 1966.1853930899. The cubic root of 3865885 is about 156.9457802957.

The spelling of 3865885 in words is "three million, eight hundred sixty-five thousand, eight hundred eighty-five".