9887858772 has 96 divisors (see below), whose sum is σ = 25793940480. Its totient is φ = 2922151680.

The previous prime is 9887858759. The next prime is 9887858777. The reversal of 9887858772 is 2778587889.

It is a junction number, because it is equal to n+sod(n) for n = 9887858697 and 9887858706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9887858777) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6407433 + ... + 6408975.

It is an arithmetic number, because the mean of its divisors is an integer number (268686880).

Almost surely, 2^9887858772 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 9887858772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12896970240).

9887858772 is an abundant number, since it is smaller than the sum of its proper divisors (15906081708).

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

9887858772 is a wasteful number, since it uses less digits than its factorization.

9887858772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2733 (or 2731 counting only the distinct ones).

The product of its digits is 126443520, while the sum is 69.

The square root of 9887858772 is about 99437.7130267988. The cubic root of 9887858772 is about 2146.3510322016.

The spelling of 9887858772 in words is "nine billion, eight hundred eighty-seven million, eight hundred fifty-eight thousand, seven hundred seventy-two".