9990389408 has 48 divisors (see below), whose sum is σ = 19771875144. Its totient is φ = 4969036800.

The previous prime is 9990389407. The next prime is 9990389459. The reversal of 9990389408 is 8049830999.

9990389408 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3103381264 + 6887008144 = 55708^2 + 82988^2 .

It is not an unprimeable number, because it can be changed into a prime (9990389407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7678358 + ... + 7679658.

Almost surely, 2^9990389408 is an apocalyptic number.

It is an amenable number.

9990389408 is a deficient number, since it is larger than the sum of its proper divisors (9781485736).

9990389408 is a wasteful number, since it uses less digits than its factorization.

9990389408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2385 (or 2377 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 59.

The square root of 9990389408 is about 99951.9354890139. The cubic root of 9990389408 is about 2153.7442890527.

The spelling of 9990389408 in words is "nine billion, nine hundred ninety million, three hundred eighty-nine thousand, four hundred eight".