38138909 has 8 divisors (see below), whose sum is σ = 40656000. Its totient is φ = 35672832.

The previous prime is 38138869. The next prime is 38138927. The reversal of 38138909 is 90983183.

38138909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38138909 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 (38138809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11204 + ... + 14205.

It is an arithmetic number, because the mean of its divisors is an integer number (5082000).

Almost surely, 2^38138909 is an apocalyptic number.

It is an amenable number.

38138909 is a deficient number, since it is larger than the sum of its proper divisors (2517091).

38138909 is a wasteful number, since it uses less digits than its factorization.

38138909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25507.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 38138909 is about 6175.6707328030. The cubic root of 38138909 is about 336.6066992278.

The spelling of 38138909 in words is "thirty-eight million, one hundred thirty-eight thousand, nine hundred nine".