9809080138 has 96 divisors (see below), whose sum is σ = 18943645392. Its totient is φ = 3768145920.

The previous prime is 9809080133. The next prime is 9809080157. The reversal of 9809080138 is 8310809089.

It can be written as a sum of positive squares in 8 ways, for example, as 8229574089 + 1579506049 = 90717^2 + 39743^2 .

It is not an unprimeable number, because it can be changed into a prime (9809080133) 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, 1976356 + ... + 1981312.

Almost surely, 2^9809080138 is an apocalyptic number.

9809080138 is a deficient number, since it is larger than the sum of its proper divisors (9134565254).

9809080138 is a wasteful number, since it uses less digits than its factorization.

9809080138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5048 (or 5037 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 46.

The square root of 9809080138 is about 99040.8003703524. The cubic root of 9809080138 is about 2140.6356845906.

The spelling of 9809080138 in words is "nine billion, eight hundred nine million, eighty thousand, one hundred thirty-eight".