3938442443 has 4 divisors (see below), whose sum is σ = 4241399568. Its totient is φ = 3635485320.

The previous prime is 3938442433. The next prime is 3938442463. The reversal of 3938442443 is 3442448393.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3442448393 = 29 ⋅118705117.

It is a cyclic number.

It is not a de Polignac number, because 3938442443 - 2⁴ = 3938442427 is a prime.

It is a super-2 number, since 2×3938442443² = 31022657753647616498, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3938442394 and 3938442403.

It is not an unprimeable number, because it can be changed into a prime (3938442413) 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, 151478543 + ... + 151478568.

It is an arithmetic number, because the mean of its divisors is an integer number (1060349892).

Almost surely, 2^3938442443 is an apocalyptic number.

3938442443 is a deficient number, since it is larger than the sum of its proper divisors (302957125).

3938442443 is a wasteful number, since it uses less digits than its factorization.

3938442443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302957124.

The product of its digits is 995328, while the sum is 44.

The square root of 3938442443 is about 62757.0111063298. The cubic root of 3938442443 is about 1579.2158747372.

The spelling of 3938442443 in words is "three billion, nine hundred thirty-eight million, four hundred forty-two thousand, four hundred forty-three".