9791620220 has 24 divisors (see below), whose sum is σ = 21771956304. Its totient is φ = 3686256896.

The previous prime is 9791620219. The next prime is 9791620277. The reversal of 9791620220 is 220261979.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14399102 + ... + 14399781.

It is an arithmetic number, because the mean of its divisors is an integer number (907164846).

Almost surely, 2^9791620220 is an apocalyptic number.

It is an amenable number.

9791620220 is an abundant number, since it is smaller than the sum of its proper divisors (11980336084).

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

9791620220 is a wasteful number, since it uses less digits than its factorization.

9791620220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28798909 (or 28798907 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 9791620220 is about 98952.6160341403. The cubic root of 9791620220 is about 2139.3648375569.

The spelling of 9791620220 in words is "nine billion, seven hundred ninety-one million, six hundred twenty thousand, two hundred twenty".