Search a number
9999898832 = 2473113372

9999898832 has 240 divisors, whose sum is σ = 25542115200. Its totient is φ = 3790765440.

The previous prime is 9999898829. The next prime is 9999898837. The reversal of 9999898832 is 2388989999.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is a Harshad number since it is a multiple of its sum of digits (74).

It is a self number, because there is not a number n which added to its sum of digits gives 9999898832.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999898837) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 270267518 + ... + 270267554.

It is an arithmetic number, because the mean of its divisors is an integer number (106425480).

Almost surely, 29999898832 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 9999898832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12771057600).

9999898832 is an abundant number, since it is smaller than the sum of its proper divisors (15542216368).

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

9999898832 is an equidigital number, since it uses as much as digits as its factorization.

9999898832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136 (or 57 counting only the distinct ones).

The product of its digits is 181398528, while the sum is 74.

The square root of 9999898832 is about 99999.4941587206. The cubic root of 9999898832 is about 2154.4274246791.

The spelling of 9999898832 in words is "nine billion, nine hundred ninety-nine million, eight hundred ninety-eight thousand, eight hundred thirty-two".