9919236408 has 64 divisors (see below), whose sum is σ = 25837470720. Its totient is φ = 3169824000.

The previous prime is 9919236403. The next prime is 9919236419. The reversal of 9919236408 is 8046329199.

9919236408 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9919236403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17308 + ... + 141908.

It is an arithmetic number, because the mean of its divisors is an integer number (403710480).

Almost surely, 2^9919236408 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 9919236408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12918735360).

9919236408 is an abundant number, since it is smaller than the sum of its proper divisors (15918234312).

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

9919236408 is a wasteful number, since it uses less digits than its factorization.

9919236408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124748 (or 124744 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 51.

The square root of 9919236408 is about 99595.3633860533. The cubic root of 9919236408 is about 2148.6190091659.

The spelling of 9919236408 in words is "nine billion, nine hundred nineteen million, two hundred thirty-six thousand, four hundred eight".