3890439 has 24 divisors (see below), whose sum is σ = 6599840. Its totient is φ = 2161728.

The previous prime is 3890431. The next prime is 3890503. The reversal of 3890439 is 9340983.

It is not a de Polignac number, because 3890439 - 2³ = 3890431 is a prime.

It is a super-2 number, since 2×3890439² = 30271031225442, which contains 22 as substring.

It is a Duffinian number.

3890439 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3890431) 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 23 ways as a sum of consecutive naturals, for example, 1497 + ... + 3165.

Almost surely, 2^3890439 is an apocalyptic number.

3890439 is a deficient number, since it is larger than the sum of its proper divisors (2709401).

3890439 is a wasteful number, since it uses less digits than its factorization.

3890439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1719 (or 1716 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 3890439 is about 1972.4195801097. The cubic root of 3890439 is about 157.2773573775.

The spelling of 3890439 in words is "three million, eight hundred ninety thousand, four hundred thirty-nine".