9885401728 has 16 divisors (see below), whose sum is σ = 19693574010. Its totient is φ = 4942700800.

The previous prime is 9885401707. The next prime is 9885401749. The reversal of 9885401728 is 8271045889.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (9885401707) and next prime (9885401749).

It can be written as a sum of positive squares in only one way, i.e., 9839052864 + 46348864 = 99192^2 + 6808^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 38614723 + ... + 38614978.

Almost surely, 2^9885401728 is an apocalyptic number.

It is an amenable number.

9885401728 is a deficient number, since it is larger than the sum of its proper divisors (9808172282).

9885401728 is an equidigital number, since it uses as much as digits as its factorization.

9885401728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77229715 (or 77229703 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 52.

The square root of 9885401728 is about 99425.3575703905. The cubic root of 9885401728 is about 2146.1732344960.

The spelling of 9885401728 in words is "nine billion, eight hundred eighty-five million, four hundred one thousand, seven hundred twenty-eight".