99643536 has 120 divisors (see below), whose sum is σ = 292481280. Its totient is φ = 31627008.

The previous prime is 99643501. The next prime is 99643559. The reversal of 99643536 is 63534699.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 99643491 and 99643500.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 446721 + ... + 446943.

It is an arithmetic number, because the mean of its divisors is an integer number (2437344).

Almost surely, 2^99643536 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 99643536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146240640).

99643536 is an abundant number, since it is smaller than the sum of its proper divisors (192837744).

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

99643536 is a wasteful number, since it uses less digits than its factorization.

99643536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373 (or 364 counting only the distinct ones).

The product of its digits is 524880, while the sum is 45.

The square root of 99643536 is about 9982.1608883047. The cubic root of 99643536 is about 463.6067069633.

The spelling of 99643536 in words is "ninety-nine million, six hundred forty-three thousand, five hundred thirty-six".