38442839 has 2 divisors, whose sum is σ = 38442840. Its totient is φ = 38442838.

The previous prime is 38442829. The next prime is 38442841. The reversal of 38442839 is 93824483.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38442839 - 2⁴ = 38442823 is a prime.

Together with 38442841, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 38442796 and 38442805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38442829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19221419 + 19221420.

It is an arithmetic number, because the mean of its divisors is an integer number (19221420).

Almost surely, 2^38442839 is an apocalyptic number.

38442839 is a deficient number, since it is larger than the sum of its proper divisors (1).

38442839 is an equidigital number, since it uses as much as digits as its factorization.

38442839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 41.

The square root of 38442839 is about 6200.2289473857. The cubic root of 38442839 is about 337.4984771765.

The spelling of 38442839 in words is "thirty-eight million, four hundred forty-two thousand, eight hundred thirty-nine".