38139438 has 8 divisors (see below), whose sum is σ = 76278888. Its totient is φ = 12713144.

The previous prime is 38139433. The next prime is 38139443. The reversal of 38139438 is 83493183.

It is an interprime number because it is at equal distance from previous prime (38139433) and next prime (38139443).

It is a sphenic number, since it is the product of 3 distinct primes.

38139438 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 38139396 and 38139405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38139433) 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, 3178281 + ... + 3178292.

It is an arithmetic number, because the mean of its divisors is an integer number (9534861).

Almost surely, 2^38139438 is an apocalyptic number.

38139438 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38139438 is a wasteful number, since it uses less digits than its factorization.

38139438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6356578.

The product of its digits is 62208, while the sum is 39.

The square root of 38139438 is about 6175.7135620105. The cubic root of 38139438 is about 336.6082555048.

The spelling of 38139438 in words is "thirty-eight million, one hundred thirty-nine thousand, four hundred thirty-eight".