9884139520 has 76 divisors (see below), whose sum is σ = 23725035324. Its totient is φ = 3953131520.

The previous prime is 9884139451. The next prime is 9884139523. The reversal of 9884139520 is 259314889.

It can be written as a sum of positive squares in 2 ways, for example, as 2218786816 + 7665352704 = 47104^2 + 87552^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9884139523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1306950 + ... + 1314490.

Almost surely, 2^9884139520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9884139520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11862517662).

9884139520 is an abundant number, since it is smaller than the sum of its proper divisors (13840895804).

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

9884139520 is an frugal number, since it uses more digits than its factorization.

9884139520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7582 (or 7548 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 49.

The square root of 9884139520 is about 99419.0098522410. The cubic root of 9884139520 is about 2146.0818865872.

The spelling of 9884139520 in words is "nine billion, eight hundred eighty-four million, one hundred thirty-nine thousand, five hundred twenty".