9798278221 has 8 divisors (see below), whose sum is σ = 10165184000. Its totient is φ = 9434549520.

The previous prime is 9798278213. The next prime is 9798278239. The reversal of 9798278221 is 1228728979.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9798278221 - 2³ = 9798278213 is a prime.

It is a super-2 number, since 2×9798278221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9798278821) 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, 787986 + ... + 800323.

It is an arithmetic number, because the mean of its divisors is an integer number (1270648000).

Almost surely, 2^9798278221 is an apocalyptic number.

It is an amenable number.

9798278221 is a deficient number, since it is larger than the sum of its proper divisors (366905779).

9798278221 is a wasteful number, since it uses less digits than its factorization.

9798278221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1588539.

The product of its digits is 2032128, while the sum is 55.

The square root of 9798278221 is about 98986.2526869262. The cubic root of 9798278221 is about 2139.8496284855.

The spelling of 9798278221 in words is "nine billion, seven hundred ninety-eight million, two hundred seventy-eight thousand, two hundred twenty-one".