3938439 has 4 divisors (see below), whose sum is σ = 5251256. Its totient is φ = 2625624.

The previous prime is 3938437. The next prime is 3938447. The reversal of 3938439 is 9348393.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9348393 = 3 ⋅3116131.

It is not a de Polignac number, because 3938439 - 2¹ = 3938437 is a prime.

It is a super-2 number, since 2×3938439² = 31022603513442, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3938397 and 3938406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3938437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 656404 + ... + 656409.

It is an arithmetic number, because the mean of its divisors is an integer number (1312814).

Almost surely, 2^3938439 is an apocalyptic number.

3938439 is a deficient number, since it is larger than the sum of its proper divisors (1312817).

3938439 is a wasteful number, since it uses less digits than its factorization.

3938439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312816.

The product of its digits is 69984, while the sum is 39.

The square root of 3938439 is about 1984.5500749540. The cubic root of 3938439 is about 157.9215414552.

The spelling of 3938439 in words is "three million, nine hundred thirty-eight thousand, four hundred thirty-nine".