99943800 has 192 divisors, whose sum is σ = 356227200. Its totient is φ = 22924800.

The previous prime is 99943751. The next prime is 99943801. The reversal of 99943800 is 834999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99943801) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 125002 + ... + 125798.

It is an arithmetic number, because the mean of its divisors is an integer number (1855350).

Almost surely, 2^99943800 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 99943800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178113600).

99943800 is an abundant number, since it is smaller than the sum of its proper divisors (256283400).

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

99943800 is a wasteful number, since it uses less digits than its factorization.

99943800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846 (or 837 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 99943800 is about 9997.1896050840. The cubic root of 99943800 is about 464.0719146363.

The spelling of 99943800 in words is "ninety-nine million, nine hundred forty-three thousand, eight hundred".