3990015 has 12 divisors (see below), whose sum is σ = 6916104. Its totient is φ = 2127984.

The previous prime is 3990011. The next prime is 3990029. The reversal of 3990015 is 5100993.

It is not a de Polignac number, because 3990015 - 2² = 3990011 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3990011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44289 + ... + 44378.

It is an arithmetic number, because the mean of its divisors is an integer number (576342).

Almost surely, 2^3990015 is an apocalyptic number.

3990015 is a deficient number, since it is larger than the sum of its proper divisors (2926089).

3990015 is a wasteful number, since it uses less digits than its factorization.

3990015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88678 (or 88675 counting only the distinct ones).

The product of its (nonzero) digits is 1215, while the sum is 27.

The square root of 3990015 is about 1997.5021902366. The cubic root of 3990015 is about 158.6079101426.

The spelling of 3990015 in words is "three million, nine hundred ninety thousand, fifteen".