9909396490 has 64 divisors (see below), whose sum is σ = 20528640000. Its totient is φ = 3373667136.

The previous prime is 9909396479. The next prime is 9909396493. The reversal of 9909396490 is 946939099.

It is a super-2 number, since 2×9909396490² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9909396493) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8347677 + ... + 8348863.

It is an arithmetic number, because the mean of its divisors is an integer number (320760000).

Almost surely, 2^9909396490 is an apocalyptic number.

9909396490 is an abundant number, since it is smaller than the sum of its proper divisors (10619243510).

9909396490 is a wasteful number, since it uses less digits than its factorization.

9909396490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1939.

The product of its (nonzero) digits is 4251528, while the sum is 58.

The square root of 9909396490 is about 99545.9516504815. The cubic root of 9909396490 is about 2147.9082948560.

The spelling of 9909396490 in words is "nine billion, nine hundred nine million, three hundred ninety-six thousand, four hundred ninety".