9811435940 has 12 divisors (see below), whose sum is σ = 20604015516. Its totient is φ = 3924574368.

The previous prime is 9811435939. The next prime is 9811435943. The reversal of 9811435940 is 495341189.

It can be written as a sum of positive squares in 2 ways, for example, as 5367613696 + 4443822244 = 73264^2 + 66662^2 .

It is a junction number, because it is equal to n+sod(n) for n = 9811435891 and 9811435900.

It is not an unprimeable number, because it can be changed into a prime (9811435943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245285879 + ... + 245285918.

It is an arithmetic number, because the mean of its divisors is an integer number (1717001293).

Almost surely, 2^9811435940 is an apocalyptic number.

It is an amenable number.

9811435940 is an abundant number, since it is smaller than the sum of its proper divisors (10792579576).

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

9811435940 is a wasteful number, since it uses less digits than its factorization.

9811435940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490571806 (or 490571804 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 9811435940 is about 99052.6927448214. The cubic root of 9811435940 is about 2140.8070397738.

The spelling of 9811435940 in words is "nine billion, eight hundred eleven million, four hundred thirty-five thousand, nine hundred forty".