3891885 has 8 divisors (see below), whose sum is σ = 6227040. Its totient is φ = 2075664.

The previous prime is 3891883. The next prime is 3891893. The reversal of 3891885 is 5881983.

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

It is not a de Polignac number, because 3891885 - 2¹ = 3891883 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3891883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129715 + ... + 129744.

It is an arithmetic number, because the mean of its divisors is an integer number (778380).

Almost surely, 2^3891885 is an apocalyptic number.

It is an amenable number.

3891885 is a deficient number, since it is larger than the sum of its proper divisors (2335155).

3891885 is a wasteful number, since it uses less digits than its factorization.

3891885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259467.

The product of its digits is 69120, while the sum is 42.

The square root of 3891885 is about 1972.7861009243. The cubic root of 3891885 is about 157.2968406019.

The spelling of 3891885 in words is "three million, eight hundred ninety-one thousand, eight hundred eighty-five".