99555800 has 48 divisors (see below), whose sum is σ = 234434400. Its totient is φ = 39312000.

The previous prime is 99555767. The next prime is 99555803. The reversal of 99555800 is 855599.

It is a happy number.

It is a super-3 number, since 3×99555800³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99555803) 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, 12650 + ... + 18950.

It is an arithmetic number, because the mean of its divisors is an integer number (4884050).

Almost surely, 2^99555800 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 99555800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117217200).

99555800 is an abundant number, since it is smaller than the sum of its proper divisors (134878600).

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

99555800 is a wasteful number, since it uses less digits than its factorization.

99555800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6396 (or 6387 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 41.

The square root of 99555800 is about 9977.7652808632. The cubic root of 99555800 is about 463.4705986462.

The spelling of 99555800 in words is "ninety-nine million, five hundred fifty-five thousand, eight hundred".