9890909208 has 48 divisors (see below), whose sum is σ = 27441250200. Its totient is φ = 3216554880.

The previous prime is 9890909207. The next prime is 9890909239. The reversal of 9890909208 is 8029090989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9890909201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1672338 + ... + 1678241.

Almost surely, 2^9890909208 is an apocalyptic number.

It is an amenable number.

9890909208 is an abundant number, since it is smaller than the sum of its proper divisors (17550340992).

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

9890909208 is a wasteful number, since it uses less digits than its factorization.

9890909208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3350632 (or 3350625 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 54.

The square root of 9890909208 is about 99453.0502699641. The cubic root of 9890909208 is about 2146.5717282233.

The spelling of 9890909208 in words is "nine billion, eight hundred ninety million, nine hundred nine thousand, two hundred eight".