38418439 has 2 divisors, whose sum is σ = 38418440. Its totient is φ = 38418438.

The previous prime is 38418433. The next prime is 38418449. The reversal of 38418439 is 93481483.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38418439 - 2³ = 38418431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38418431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19209219 + 19209220.

It is an arithmetic number, because the mean of its divisors is an integer number (19209220).

Almost surely, 2^38418439 is an apocalyptic number.

38418439 is a deficient number, since it is larger than the sum of its proper divisors (1).

38418439 is an equidigital number, since it uses as much as digits as its factorization.

38418439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 40.

The square root of 38418439 is about 6198.2609657871. The cubic root of 38418439 is about 337.4270576704.

The spelling of 38418439 in words is "thirty-eight million, four hundred eighteen thousand, four hundred thirty-nine".