9990388485 has 48 divisors (see below), whose sum is σ = 21589626240. Its totient is φ = 4151848320.

The previous prime is 9990388483. The next prime is 9990388517. The reversal of 9990388485 is 5848830999.

9990388485 is a `hidden beast` number, since 99 + 90 + 388 + 4 + 85 = 666.

9990388485 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9990388485 - 2¹ = 9990388483 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9990388483) 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 47 ways as a sum of consecutive naturals, for example, 1438150 + ... + 1445079.

It is an arithmetic number, because the mean of its divisors is an integer number (449783880).

Almost surely, 2^9990388485 is an apocalyptic number.

It is an amenable number.

9990388485 is an abundant number, since it is smaller than the sum of its proper divisors (11599237755).

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

9990388485 is a wasteful number, since it uses less digits than its factorization.

9990388485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2883258 (or 2883255 counting only the distinct ones).

The product of its (nonzero) digits is 22394880, while the sum is 63.

The square root of 9990388485 is about 99951.9308717946. The cubic root of 9990388485 is about 2153.7442227254.

The spelling of 9990388485 in words is "nine billion, nine hundred ninety million, three hundred eighty-eight thousand, four hundred eighty-five".