9939850388 has 24 divisors (see below), whose sum is σ = 18740720712. Its totient is φ = 4585682304.

The previous prime is 9939850357. The next prime is 9939850409. The reversal of 9939850388 is 8830589399.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 939912964 + 8999937424 = 30658^2 + 94868^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 9939850388.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87506 + ... + 165942.

It is an arithmetic number, because the mean of its divisors is an integer number (780863363).

Almost surely, 2^9939850388 is an apocalyptic number.

It is an amenable number.

9939850388 is a deficient number, since it is larger than the sum of its proper divisors (8800870324).

9939850388 is a wasteful number, since it uses less digits than its factorization.

9939850388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80891 (or 80889 counting only the distinct ones).

The product of its (nonzero) digits is 16796160, while the sum is 62.

The square root of 9939850388 is about 99698.7983277632. The cubic root of 9939850388 is about 2150.1063865150.

The spelling of 9939850388 in words is "nine billion, nine hundred thirty-nine million, eight hundred fifty thousand, three hundred eighty-eight".