9808888090 has 16 divisors (see below), whose sum is σ = 17897862888. Its totient is φ = 3869807616.

The previous prime is 9808888049. The next prime is 9808888099. The reversal of 9808888090 is 908888089.

It can be written as a sum of positive squares in 4 ways, for example, as 9526345609 + 282542481 = 97603^2 + 16809^2 .

It is not an unprimeable number, because it can be changed into a prime (9808888099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6717687 + ... + 6719146.

Almost surely, 2^9808888090 is an apocalyptic number.

9808888090 is a deficient number, since it is larger than the sum of its proper divisors (8088974798).

9808888090 is a wasteful number, since it uses less digits than its factorization.

9808888090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13436913.

The product of its (nonzero) digits is 2654208, while the sum is 58.

The square root of 9808888090 is about 99039.8308257844. The cubic root of 9808888090 is about 2140.6217142870.

The spelling of 9808888090 in words is "nine billion, eight hundred eight million, eight hundred eighty-eight thousand, ninety".