99855824 has 80 divisors (see below), whose sum is σ = 214057728. Its totient is φ = 44937216.

The previous prime is 99855823. The next prime is 99855829. The reversal of 99855824 is 42855899.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99855823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 933179 + ... + 933285.

Almost surely, 2^99855824 is an apocalyptic number.

99855824 is a gapful number since it is divisible by the number (94) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99855824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107028864).

99855824 is an abundant number, since it is smaller than the sum of its proper divisors (114201904).

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

99855824 is a wasteful number, since it uses less digits than its factorization.

99855824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252 (or 246 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 50.

The square root of 99855824 is about 9992.7885997853. The cubic root of 99855824 is about 463.9357075010.

The spelling of 99855824 in words is "ninety-nine million, eight hundred fifty-five thousand, eight hundred twenty-four".