999988704 has 144 divisors (see below), whose sum is σ = 3341008944. Its totient is φ = 279705600.

The previous prime is 999988679. The next prime is 999988747. The reversal of 999988704 is 407889999.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29044 + ... + 53324.

It is an arithmetic number, because the mean of its divisors is an integer number (23201451).

Almost surely, 2^999988704 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 999988704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1670504472).

999988704 is an abundant number, since it is smaller than the sum of its proper divisors (2341020240).

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

999988704 is a wasteful number, since it uses less digits than its factorization.

999988704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24321 (or 24310 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 63.

The square root of 999988704 is about 31622.5979957372. The cubic root of 999988704 is about 999.9962346525.

The spelling of 999988704 in words is "nine hundred ninety-nine million, nine hundred eighty-eight thousand, seven hundred four".