9812743920 has 960 divisors, whose sum is σ = 42747264000. Its totient is φ = 2056513536.

The previous prime is 9812743907. The next prime is 9812743991. The reversal of 9812743920 is 293472189.

9812743920 is a `hidden beast` number, since 98 + 127 + 439 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 70595211 + ... + 70595349.

It is an arithmetic number, because the mean of its divisors is an integer number (44528400).

Almost surely, 2^9812743920 is an apocalyptic number.

9812743920 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 9812743920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21373632000).

9812743920 is an abundant number, since it is smaller than the sum of its proper divisors (32934520080).

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

9812743920 is a wasteful number, since it uses less digits than its factorization.

9812743920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 9812743920 is about 99059.2949702349. The cubic root of 9812743920 is about 2140.9021671465.

The spelling of 9812743920 in words is "nine billion, eight hundred twelve million, seven hundred forty-three thousand, nine hundred twenty".