99780912 has 120 divisors (see below), whose sum is σ = 348192000. Its totient is φ = 25914240.

The previous prime is 99780907. The next prime is 99780937. The reversal of 99780912 is 21908799.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6589 + ... + 15587.

It is an arithmetic number, because the mean of its divisors is an integer number (2901600).

Almost surely, 2^99780912 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 99780912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174096000).

99780912 is an abundant number, since it is smaller than the sum of its proper divisors (248411088).

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

99780912 is a wasteful number, since it uses less digits than its factorization.

99780912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9031 (or 9022 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 99780912 is about 9989.0395934744. The cubic root of 99780912 is about 463.8196633723.

The spelling of 99780912 in words is "ninety-nine million, seven hundred eighty thousand, nine hundred twelve".