99909768 has 64 divisors (see below), whose sum is σ = 293189760. Its totient is φ = 27772416.

The previous prime is 99909767. The next prime is 99909779. The reversal of 99909768 is 86790999.

It is not an unprimeable number, because it can be changed into a prime (99909767) 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, 1821 + ... + 14252.

It is an arithmetic number, because the mean of its divisors is an integer number (4581090).

Almost surely, 2^99909768 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 99909768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146594880).

99909768 is an abundant number, since it is smaller than the sum of its proper divisors (193279992).

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

99909768 is a wasteful number, since it uses less digits than its factorization.

99909768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16126 (or 16122 counting only the distinct ones).

The product of its (nonzero) digits is 2204496, while the sum is 57.

The square root of 99909768 is about 9995.4873818139. The cubic root of 99909768 is about 464.0192347357.

The spelling of 99909768 in words is "ninety-nine million, nine hundred nine thousand, seven hundred sixty-eight".