9938105640 has 48 divisors (see below), whose sum is σ = 32298844500. Its totient is φ = 2650161408.

The previous prime is 9938105533. The next prime is 9938105651. The reversal of 9938105640 is 465018399.

It is a happy number.

9938105640 is a `hidden beast` number, since 9 + 9 + 3 + 81 + 0 + 564 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8406322596 + 1531783044 = 91686^2 + 39138^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13802565 + ... + 13803284.

Almost surely, 2^9938105640 is an apocalyptic number.

9938105640 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

9938105640 is an abundant number, since it is smaller than the sum of its proper divisors (22360738860).

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

9938105640 is a wasteful number, since it uses less digits than its factorization.

9938105640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27605866 (or 27605859 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 9938105640 is about 99690.0478483183. The cubic root of 9938105640 is about 2149.9805759918.

The spelling of 9938105640 in words is "nine billion, nine hundred thirty-eight million, one hundred five thousand, six hundred forty".