38438040189 has 4 divisors (see below), whose sum is σ = 51250720256. Its totient is φ = 25625360124.

The previous prime is 38438040181. The next prime is 38438040217. The reversal of 38438040189 is 98104083483.

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 not a de Polignac number, because 38438040189 - 2³ = 38438040181 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 (38438040181) 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, 6406340029 + ... + 6406340034.

It is an arithmetic number, because the mean of its divisors is an integer number (12812680064).

Almost surely, 2^38438040189 is an apocalyptic number.

It is an amenable number.

38438040189 is a deficient number, since it is larger than the sum of its proper divisors (12812680067).

38438040189 is a wasteful number, since it uses less digits than its factorization.

38438040189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12812680066.

The product of its (nonzero) digits is 663552, while the sum is 48.

The spelling of 38438040189 in words is "thirty-eight billion, four hundred thirty-eight million, forty thousand, one hundred eighty-nine".