9988043628 has 24 divisors (see below), whose sum is σ = 23600442880. Its totient is φ = 3287203920.

The previous prime is 9988043587. The next prime is 9988043629. The reversal of 9988043628 is 8263408899.

It is a super-2 number, since 2×9988043628² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9988043629) 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, 5267008 + ... + 5268903.

Almost surely, 2^9988043628 is an apocalyptic number.

It is an amenable number.

9988043628 is an abundant number, since it is smaller than the sum of its proper divisors (13612399252).

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

9988043628 is a wasteful number, since it uses less digits than its factorization.

9988043628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10535997 (or 10535995 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 57.

The square root of 9988043628 is about 99940.2002599555. The cubic root of 9988043628 is about 2153.5757068433.

The spelling of 9988043628 in words is "nine billion, nine hundred eighty-eight million, forty-three thousand, six hundred twenty-eight".