3990437 has 16 divisors (see below), whose sum is σ = 4672320. Its totient is φ = 3369600.

The previous prime is 3990419. The next prime is 3990449. The reversal of 3990437 is 7340993.

It is a cyclic number.

It is not a de Polignac number, because 3990437 - 2⁶ = 3990373 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3990397 and 3990406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3990037) 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, 12593 + ... + 12905.

It is an arithmetic number, because the mean of its divisors is an integer number (292020).

Almost surely, 2^3990437 is an apocalyptic number.

It is an amenable number.

3990437 is a deficient number, since it is larger than the sum of its proper divisors (681883).

3990437 is a wasteful number, since it uses less digits than its factorization.

3990437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 3990437 is about 1997.6078193680. The cubic root of 3990437 is about 158.6135016151.

The spelling of 3990437 in words is "three million, nine hundred ninety thousand, four hundred thirty-seven".