9987787628 has 96 divisors (see below), whose sum is σ = 22506494976. Its totient is φ = 3769489152.

The previous prime is 9987787609. The next prime is 9987787631. The reversal of 9987787628 is 8267877899.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3707450 + ... + 3710142.

It is an arithmetic number, because the mean of its divisors is an integer number (234442656).

Almost surely, 2^9987787628 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 9987787628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11253247488).

9987787628 is an abundant number, since it is smaller than the sum of its proper divisors (12518707348).

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

9987787628 is a wasteful number, since it uses less digits than its factorization.

9987787628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3183 (or 3181 counting only the distinct ones).

The product of its digits is 170698752, while the sum is 71.

The square root of 9987787628 is about 99938.9194858540. The cubic root of 9987787628 is about 2153.5573075080.

The spelling of 9987787628 in words is "nine billion, nine hundred eighty-seven million, seven hundred eighty-seven thousand, six hundred twenty-eight".