38158109 has 4 divisors (see below), whose sum is σ = 41627040. Its totient is φ = 34689180.

The previous prime is 38158093. The next prime is 38158121. The reversal of 38158109 is 90185183.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 38158109 - 2⁴ = 38158093 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 (38158139) 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, 1734449 + ... + 1734470.

It is an arithmetic number, because the mean of its divisors is an integer number (10406760).

Almost surely, 2^38158109 is an apocalyptic number.

It is an amenable number.

38158109 is a deficient number, since it is larger than the sum of its proper divisors (3468931).

38158109 is a wasteful number, since it uses less digits than its factorization.

38158109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3468930.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 38158109 is about 6177.2250242322. The cubic root of 38158109 is about 336.6631749248.

The spelling of 38158109 in words is "thirty-eight million, one hundred fifty-eight thousand, one hundred nine".