38817239856 has 160 divisors (see below), whose sum is σ = 107911664640. Its totient is φ = 11986071552.

The previous prime is 38817239849. The next prime is 38817239873. The reversal of 38817239856 is 65893271883.

It is a super-2 number, since 2×38817239856² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 38817239856.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16288041 + ... + 16290423.

It is an arithmetic number, because the mean of its divisors is an integer number (674447904).

Almost surely, 2^38817239856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38817239856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53955832320).

38817239856 is an abundant number, since it is smaller than the sum of its proper divisors (69094424784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38817239856 is a wasteful number, since it uses less digits than its factorization.

38817239856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2803 (or 2797 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 60.

The spelling of 38817239856 in words is "thirty-eight billion, eight hundred seventeen million, two hundred thirty-nine thousand, eight hundred fifty-six".