38128439 has 2 divisors, whose sum is σ = 38128440. Its totient is φ = 38128438.

The previous prime is 38128423. The next prime is 38128499. The reversal of 38128439 is 93482183.

It is a weak prime.

It is an emirp because it is prime and its reverse (93482183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38128439 - 2⁴ = 38128423 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38128499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19064219 + 19064220.

It is an arithmetic number, because the mean of its divisors is an integer number (19064220).

Almost surely, 2^38128439 is an apocalyptic number.

38128439 is a deficient number, since it is larger than the sum of its proper divisors (1).

38128439 is an equidigital number, since it uses as much as digits as its factorization.

38128439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 38.

The square root of 38128439 is about 6174.8229934145. The cubic root of 38128439 is about 336.5758943378.

The spelling of 38128439 in words is "thirty-eight million, one hundred twenty-eight thousand, four hundred thirty-nine".