9990388484 has 24 divisors (see below), whose sum is σ = 17747009280. Its totient is φ = 4920242624.

The previous prime is 9990388483. The next prime is 9990388517. The reversal of 9990388484 is 4848830999.

It is a super-2 number, since 2×9990388484² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9990388483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40277 + ... + 146979.

It is an arithmetic number, because the mean of its divisors is an integer number (739458720).

Almost surely, 2^9990388484 is an apocalyptic number.

It is an amenable number.

9990388484 is a deficient number, since it is larger than the sum of its proper divisors (7756620796).

9990388484 is a wasteful number, since it uses less digits than its factorization.

9990388484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107059 (or 107057 counting only the distinct ones).

The product of its (nonzero) digits is 17915904, while the sum is 62.

The square root of 9990388484 is about 99951.9308667922. The cubic root of 9990388484 is about 2153.7442226535.

The spelling of 9990388484 in words is "nine billion, nine hundred ninety million, three hundred eighty-eight thousand, four hundred eighty-four".