3990369 has 16 divisors (see below), whose sum is σ = 5472000. Its totient is φ = 2585856.

The previous prime is 3990353. The next prime is 3990373. The reversal of 3990369 is 9630993.

It is not a de Polignac number, because 3990369 - 2⁴ = 3990353 is a prime.

It is a super-2 number, since 2×3990369² = 31846089512322, which contains 22 as substring.

3990369 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3990379) 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, 26707 + ... + 26855.

It is an arithmetic number, because the mean of its divisors is an integer number (342000).

Almost surely, 2^3990369 is an apocalyptic number.

It is an amenable number.

3990369 is a deficient number, since it is larger than the sum of its proper divisors (1481631).

3990369 is a wasteful number, since it uses less digits than its factorization.

3990369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344.

The product of its (nonzero) digits is 39366, while the sum is 39.

The square root of 3990369 is about 1997.5907989376. The cubic root of 3990369 is about 158.6126006462.

The spelling of 3990369 in words is "three million, nine hundred ninety thousand, three hundred sixty-nine".