38139871 has 8 divisors (see below), whose sum is σ = 47551104. Its totient is φ = 29719320.

The previous prime is 38139869. The next prime is 38139877. The reversal of 38139871 is 17893183.

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

It is a cyclic number.

It is not a de Polignac number, because 38139871 - 2¹ = 38139869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38139877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247585 + ... + 247738.

It is an arithmetic number, because the mean of its divisors is an integer number (5943888).

Almost surely, 2^38139871 is an apocalyptic number.

38139871 is a deficient number, since it is larger than the sum of its proper divisors (9411233).

38139871 is a wasteful number, since it uses less digits than its factorization.

38139871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495341.

The product of its digits is 36288, while the sum is 40.

The square root of 38139871 is about 6175.7486185887. The cubic root of 38139871 is about 336.6095293465.

The spelling of 38139871 in words is "thirty-eight million, one hundred thirty-nine thousand, eight hundred seventy-one".