9859449888 has 54 divisors (see below), whose sum is σ = 28042603407. Its totient is φ = 3285921600.

The previous prime is 9859449883. The next prime is 9859449959. The reversal of 9859449888 is 8889449589.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

9859449888 is a `hidden beast` number, since 9 + 8 + 59 + 4 + 498 + 88 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4929724944 + 4929724944 = 70212^2 + 70212^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=70212.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is not an unprimeable number, because it can be changed into a prime (9859449881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1682163 + ... + 1688013.

Almost surely, 2^9859449888 is an apocalyptic number.

It is an amenable number.

9859449888 is an abundant number, since it is smaller than the sum of its proper divisors (18183153519).

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

9859449888 is an frugal number, since it uses more digits than its factorization.

9859449888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11718 (or 5856 counting only the distinct ones).

The product of its digits is 238878720, while the sum is 72.

The square root of 9859449888 is about 99294.7626413397. The cubic root of 9859449888 is about 2144.2934944802.

Multiplying 9859449888 by its sum of digits (72), we get a square (709880391936 = 842544²).

9859449888 divided by its sum of digits (72) gives a square (136936804 = 11702²).

The spelling of 9859449888 in words is "nine billion, eight hundred fifty-nine million, four hundred forty-nine thousand, eight hundred eighty-eight".