9399878280 has 640 divisors, whose sum is σ = 36766033920. Its totient is φ = 2134978560.

The previous prime is 9399878261. The next prime is 9399878347. The reversal of 9399878280 is 828789939.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 30031404 + ... + 30031716.

It is an arithmetic number, because the mean of its divisors is an integer number (57446928).

Almost surely, 2^9399878280 is an apocalyptic number.

9399878280 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9399878280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18383016960).

9399878280 is an abundant number, since it is smaller than the sum of its proper divisors (27366155640).

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

9399878280 is a wasteful number, since it uses less digits than its factorization.

9399878280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403 (or 390 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 63.

The square root of 9399878280 is about 96952.9694233240. The cubic root of 9399878280 is about 2110.4451850715.

The spelling of 9399878280 in words is "nine billion, three hundred ninety-nine million, eight hundred seventy-eight thousand, two hundred eighty".