9938871806 has 8 divisors (see below), whose sum is σ = 15785267040. Its totient is φ = 4677116128.

The previous prime is 9938871763. The next prime is 9938871827. The reversal of 9938871806 is 6081788399.

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

It is a super-2 number, since 2×9938871806² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146159846 + ... + 146159913.

It is an arithmetic number, because the mean of its divisors is an integer number (1973158380).

Almost surely, 2^9938871806 is an apocalyptic number.

9938871806 is a deficient number, since it is larger than the sum of its proper divisors (5846395234).

9938871806 is a wasteful number, since it uses less digits than its factorization.

9938871806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292319778.

The product of its (nonzero) digits is 5225472, while the sum is 59.

The square root of 9938871806 is about 99693.8905149157. The cubic root of 9938871806 is about 2150.0358246059.

The spelling of 9938871806 in words is "nine billion, nine hundred thirty-eight million, eight hundred seventy-one thousand, eight hundred six".