985856544 has 144 divisors (see below), whose sum is σ = 3020419584. Its totient is φ = 304128000.

The previous prime is 985856539. The next prime is 985856549. The reversal of 985856544 is 445658589.

985856544 is a `hidden beast` number, since 9 + 8 + 585 + 6 + 54 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (985856539) and next prime (985856549).

It is a tau number, because it is divible by the number of its divisors (144).

It is not an unprimeable number, because it can be changed into a prime (985856549) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 202944 + ... + 207744.

It is an arithmetic number, because the mean of its divisors is an integer number (20975136).

Almost surely, 2^985856544 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 985856544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1510209792).

985856544 is an abundant number, since it is smaller than the sum of its proper divisors (2034563040).

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

985856544 is a wasteful number, since it uses less digits than its factorization.

985856544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4871 (or 4860 counting only the distinct ones).

The product of its digits is 6912000, while the sum is 54.

The square root of 985856544 is about 31398.3525682479. The cubic root of 985856544 is about 995.2631119876.

The spelling of 985856544 in words is "nine hundred eighty-five million, eight hundred fifty-six thousand, five hundred forty-four".