38931816858 has 32 divisors (see below), whose sum is σ = 89938745280. Its totient is φ = 11103548160.

The previous prime is 38931816851. The next prime is 38931816881. The reversal of 38931816858 is 85861813983.

It is not an unprimeable number, because it can be changed into a prime (38931816851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17348173 + ... + 17350416.

It is an arithmetic number, because the mean of its divisors is an integer number (2810585790).

Almost surely, 2^38931816858 is an apocalyptic number.

38931816858 is an abundant number, since it is smaller than the sum of its proper divisors (51006928422).

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

38931816858 is a wasteful number, since it uses less digits than its factorization.

38931816858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34698622.

The product of its digits is 9953280, while the sum is 60.

The spelling of 38931816858 in words is "thirty-eight billion, nine hundred thirty-one million, eight hundred sixteen thousand, eight hundred fifty-eight".