99980040 has 64 divisors (see below), whose sum is σ = 302889600.
Its totient is φ = 26399232.
The previous prime is 99980003. The next prime is 99980047. The reversal of 99980040 is 4008999.
Subtracting from 99980040 its sum of digits (39), we obtain a square (99980001 = 99992).
It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.
It is not an unprimeable number, because it can be changed into a prime (99980047) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8316 + ... + 16404.
It is an arithmetic number, because the mean of its divisors is an integer number (4732650).
Almost surely, 299980040 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 99980040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151444800).
99980040 is an abundant number, since it is smaller than the sum of its proper divisors (202909560).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
99980040 is a wasteful number, since it uses less digits than its factorization.
99980040 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 8206 (or 8202 counting only the distinct ones).
The product of its (nonzero) digits is 23328, while the sum is 39.
The square root of 99980040 is about 9999.0019501948.
The cubic root of 99980040 is about 464.1279992687.
The spelling of 99980040 in words is "ninety-nine million, nine hundred eighty thousand, forty".