38138009 has 32 divisors (see below), whose sum is σ = 49437696. Its totient is φ = 28615680.

The previous prime is 38138003. The next prime is 38138011. The reversal of 38138009 is 90083183.

It is a cyclic number.

It is not a de Polignac number, because 38138009 - 2¹² = 38133913 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (38138003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 158129 + ... + 158369.

It is an arithmetic number, because the mean of its divisors is an integer number (1544928).

Almost surely, 2^38138009 is an apocalyptic number.

It is an amenable number.

38138009 is a deficient number, since it is larger than the sum of its proper divisors (11299687).

38138009 is a wasteful number, since it uses less digits than its factorization.

38138009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 38138009 is about 6175.5978657940. The cubic root of 38138009 is about 336.6040514645.

The spelling of 38138009 in words is "thirty-eight million, one hundred thirty-eight thousand, nine".