9998597532 has 384 divisors, whose sum is σ = 32035627008. Its totient is φ = 2348236800.

The previous prime is 9998597527. The next prime is 9998597551. The reversal of 9998597532 is 2357958999.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 76325107 + ... + 76325237.

It is an arithmetic number, because the mean of its divisors is an integer number (83426112).

Almost surely, 2^9998597532 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 9998597532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16017813504).

9998597532 is an abundant number, since it is smaller than the sum of its proper divisors (22037029476).

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

9998597532 is a wasteful number, since it uses less digits than its factorization.

9998597532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329 (or 327 counting only the distinct ones).

The product of its digits is 55112400, while the sum is 66.

The square root of 9998597532 is about 99992.9874141182. The cubic root of 9998597532 is about 2154.3339677994. Note that the first 3 decimals are identical.

The spelling of 9998597532 in words is "nine billion, nine hundred ninety-eight million, five hundred ninety-seven thousand, five hundred thirty-two".