38438878917 has 8 divisors (see below), whose sum is σ = 51341598880. Its totient is φ = 25581039120.

The previous prime is 38438878847. The next prime is 38438878927. The reversal of 38438878917 is 71987883483.

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

It is not a de Polignac number, because 38438878917 - 2¹¹ = 38438876869 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 (38438878927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11218042 + ... + 11221467.

It is an arithmetic number, because the mean of its divisors is an integer number (6417699860).

Almost surely, 2^38438878917 is an apocalyptic number.

It is an amenable number.

38438878917 is a deficient number, since it is larger than the sum of its proper divisors (12902719963).

38438878917 is a wasteful number, since it uses less digits than its factorization.

38438878917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22440083.

The product of its digits is 65028096, while the sum is 66.

The spelling of 38438878917 in words is "thirty-eight billion, four hundred thirty-eight million, eight hundred seventy-eight thousand, nine hundred seventeen".