99785910 has 128 divisors (see below), whose sum is σ = 292377600. Its totient is φ = 21288960.

The previous prime is 99785867. The next prime is 99785911. The reversal of 99785910 is 1958799.

It is a self number, because there is not a number n which added to its sum of digits gives 99785910.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99785911) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 354970 + ... + 355250.

It is an arithmetic number, because the mean of its divisors is an integer number (2284200).

Almost surely, 2^99785910 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99785910, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146188800).

99785910 is an abundant number, since it is smaller than the sum of its proper divisors (192591690).

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

99785910 is a wasteful number, since it uses less digits than its factorization.

99785910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406.

The product of its (nonzero) digits is 204120, while the sum is 48.

The square root of 99785910 is about 9989.2897645428. The cubic root of 99785910 is about 463.8274074452.

The spelling of 99785910 in words is "ninety-nine million, seven hundred eighty-five thousand, nine hundred ten".