99645408 has 72 divisors (see below), whose sum is σ = 292533696. Its totient is φ = 32140800.

The previous prime is 99645341. The next prime is 99645409. The reversal of 99645408 is 80454699.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99645409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3348 + ... + 14508.

It is an arithmetic number, because the mean of its divisors is an integer number (4062968).

Almost surely, 2^99645408 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 99645408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146266848).

99645408 is an abundant number, since it is smaller than the sum of its proper divisors (192888288).

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

99645408 is a wasteful number, since it uses less digits than its factorization.

99645408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11208 (or 11197 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 99645408 is about 9982.2546551368. The cubic root of 99645408 is about 463.6096102000.

The spelling of 99645408 in words is "ninety-nine million, six hundred forty-five thousand, four hundred eight".