9805539072 has 288 divisors, whose sum is σ = 32607719424. Its totient is φ = 2550988800.

The previous prime is 9805539059. The next prime is 9805539109. The reversal of 9805539072 is 2709355089.

It is a happy number.

It is a super-2 number, since 2×9805539072² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2831422 + ... + 2834882.

It is an arithmetic number, because the mean of its divisors is an integer number (113221248).

Almost surely, 2^9805539072 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 9805539072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16303859712).

9805539072 is an abundant number, since it is smaller than the sum of its proper divisors (22802180352).

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

9805539072 is a wasteful number, since it uses less digits than its factorization.

9805539072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3535 (or 3521 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 48.

The square root of 9805539072 is about 99022.9219524449. The cubic root of 9805539072 is about 2140.3780646284.

The spelling of 9805539072 in words is "nine billion, eight hundred five million, five hundred thirty-nine thousand, seventy-two".