3990885 has 8 divisors (see below), whose sum is σ = 6385440. Its totient is φ = 2128464.

The previous prime is 3990863. The next prime is 3990901. The reversal of 3990885 is 5880993.

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

It is not a de Polignac number, because 3990885 - 2⁵ = 3990853 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 133015 + ... + 133044.

It is an arithmetic number, because the mean of its divisors is an integer number (798180).

Almost surely, 2^3990885 is an apocalyptic number.

It is an amenable number.

3990885 is a deficient number, since it is larger than the sum of its proper divisors (2394555).

3990885 is a wasteful number, since it uses less digits than its factorization.

3990885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266067.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 3990885 is about 1997.7199503434. The cubic root of 3990885 is about 158.6194371547.

It can be divided in two parts, 39908 and 85, that added together give a palindrome (39993).

The spelling of 3990885 in words is "three million, nine hundred ninety thousand, eight hundred eighty-five".