9978924270 has 128 divisors (see below), whose sum is σ = 27948810240. Its totient is φ = 2232921600.

The previous prime is 9978924269. The next prime is 9978924287. The reversal of 9978924270 is 724298799.

9978924270 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 9978924270.

It is a congruent number.

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 63 ways as a sum of consecutive naturals, for example, 7801491 + ... + 7802769.

It is an arithmetic number, because the mean of its divisors is an integer number (218350080).

Almost surely, 2^9978924270 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9978924270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13974405120).

9978924270 is an abundant number, since it is smaller than the sum of its proper divisors (17969885970).

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

9978924270 is a wasteful number, since it uses less digits than its factorization.

9978924270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2050.

The product of its (nonzero) digits is 4572288, while the sum is 57.

The square root of 9978924270 is about 99894.5657681137. The cubic root of 9978924270 is about 2152.9200826902.

The spelling of 9978924270 in words is "nine billion, nine hundred seventy-eight million, nine hundred twenty-four thousand, two hundred seventy".