3990385 has 16 divisors (see below), whose sum is σ = 5711616. Its totient is φ = 2616768.

The previous prime is 3990383. The next prime is 3990419. The reversal of 3990385 is 5830993.

It is not a de Polignac number, because 3990385 - 2¹ = 3990383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3990383) 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 15 ways as a sum of consecutive naturals, for example, 1674 + ... + 3283.

It is an arithmetic number, because the mean of its divisors is an integer number (356976).

Almost surely, 2^3990385 is an apocalyptic number.

3990385 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3990385 is a deficient number, since it is larger than the sum of its proper divisors (1721231).

3990385 is a wasteful number, since it uses less digits than its factorization.

3990385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4992.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 3990385 is about 1997.5948037578. The cubic root of 3990385 is about 158.6128126398.

The spelling of 3990385 in words is "three million, nine hundred ninety thousand, three hundred eighty-five".