9988664442 has 32 divisors (see below), whose sum is σ = 21124744704. Its totient is φ = 3143558400.

The previous prime is 9988664419. The next prime is 9988664443. The reversal of 9988664442 is 2444668899.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (9988664443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 647283 + ... + 662534.

It is an arithmetic number, because the mean of its divisors is an integer number (660148272).

Almost surely, 2^9988664442 is an apocalyptic number.

9988664442 is an abundant number, since it is smaller than the sum of its proper divisors (11136080262).

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

9988664442 is a wasteful number, since it uses less digits than its factorization.

9988664442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1309894.

The product of its digits is 23887872, while the sum is 60.

The square root of 9988664442 is about 99943.3061390306. The cubic root of 9988664442 is about 2153.6203249320.

The spelling of 9988664442 in words is "nine billion, nine hundred eighty-eight million, six hundred sixty-four thousand, four hundred forty-two".