9994788420 has 96 divisors (see below), whose sum is σ = 28846274688. Its totient is φ = 2584200192.

The previous prime is 9994788403. The next prime is 9994788457. The reversal of 9994788420 is 248874999.

9994788420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

9994788420 is a nontrivial binomial coefficient, being equal to C(141385, 2).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 339322 + ... + 367598.

It is an arithmetic number, because the mean of its divisors is an integer number (300482028).

Almost surely, 2^9994788420 is an apocalyptic number.

9994788420 is the 141384-th triangular number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9994788420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14423137344).

9994788420 is an abundant number, since it is smaller than the sum of its proper divisors (18851486268).

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

9994788420 is a wasteful number, since it uses less digits than its factorization.

9994788420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28469 (or 28467 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 60.

The square root of 9994788420 is about 99973.9387040443. The cubic root of 9994788420 is about 2154.0603580376.

The spelling of 9994788420 in words is "nine billion, nine hundred ninety-four million, seven hundred eighty-eight thousand, four hundred twenty".