9885658860 has 648 divisors, whose sum is σ = 39239862480. Its totient is φ = 2006484480.

The previous prime is 9885658859. The next prime is 9885658877. The reversal of 9885658860 is 688565889.

9885658860 is a `hidden beast` number, since 9 + 8 + 8 + 565 + 8 + 8 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 62965902 + ... + 62966058.

Almost surely, 2^9885658860 is an apocalyptic number.

9885658860 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9885658860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19619931240).

9885658860 is an abundant number, since it is smaller than the sum of its proper divisors (29354203620).

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

9885658860 is a wasteful number, since it uses less digits than its factorization.

9885658860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267 (or 244 counting only the distinct ones).

The product of its (nonzero) digits is 33177600, while the sum is 63.

The square root of 9885658860 is about 99426.6506526293. The cubic root of 9885658860 is about 2146.1918425758.

The spelling of 9885658860 in words is "nine billion, eight hundred eighty-five million, six hundred fifty-eight thousand, eight hundred sixty".