998699520 has 320 divisors, whose sum is σ = 3932248320. Its totient is φ = 210567168.

The previous prime is 998699473. The next prime is 998699557. The reversal of 998699520 is 25996899.

It is a tau number, because it is divible by the number of its divisors (320).

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 in 31 ways as a sum of consecutive naturals, for example, 698166 + ... + 699594.

It is an arithmetic number, because the mean of its divisors is an integer number (12288276).

Almost surely, 2^998699520 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 998699520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1966124160).

998699520 is an abundant number, since it is smaller than the sum of its proper divisors (2933548800).

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

998699520 is a wasteful number, since it uses less digits than its factorization.

998699520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1475 (or 1459 counting only the distinct ones).

The product of its (nonzero) digits is 3149280, while the sum is 57.

The square root of 998699520 is about 31602.2075178301. The cubic root of 998699520 is about 999.5663186143.

The spelling of 998699520 in words is "nine hundred ninety-eight million, six hundred ninety-nine thousand, five hundred twenty".