9905690088 has 96 divisors (see below), whose sum is σ = 30765571200. Its totient is φ = 2820495744.

The previous prime is 9905690087. The next prime is 9905690153. The reversal of 9905690088 is 8800965099.

It is a super-2 number, since 2×9905690088² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9905690083) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114133 + ... + 181211.

It is an arithmetic number, because the mean of its divisors is an integer number (320474700).

Almost surely, 2^9905690088 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 9905690088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15382785600).

9905690088 is an abundant number, since it is smaller than the sum of its proper divisors (20859881112).

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

9905690088 is a wasteful number, since it uses less digits than its factorization.

9905690088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67391 (or 67384 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 54.

The square root of 9905690088 is about 99527.3333712905. Note that the first 4 decimals coincide. The cubic root of 9905690088 is about 2147.6404681064.

The spelling of 9905690088 in words is "nine billion, nine hundred five million, six hundred ninety thousand, eighty-eight".