3878985 has 16 divisors (see below), whose sum is σ = 6770880. Its totient is φ = 1880640.

The previous prime is 3878981. The next prime is 3878993. The reversal of 3878985 is 5898783.

It is a happy number.

It is not a de Polignac number, because 3878985 - 2² = 3878981 is a prime.

It is an alternating number because its digits alternate between odd and even.

3878985 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3878981) 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, 11590 + ... + 11919.

It is an arithmetic number, because the mean of its divisors is an integer number (423180).

Almost surely, 2^3878985 is an apocalyptic number.

It is an amenable number.

3878985 is a deficient number, since it is larger than the sum of its proper divisors (2891895).

3878985 is a wasteful number, since it uses less digits than its factorization.

3878985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23528.

The product of its digits is 483840, while the sum is 48.

The square root of 3878985 is about 1969.5138994178. The cubic root of 3878985 is about 157.1228567619.

The spelling of 3878985 in words is "three million, eight hundred seventy-eight thousand, nine hundred eighty-five".