9979578228 has 24 divisors (see below), whose sum is σ = 23301972288. Its totient is φ = 3324198976.

The previous prime is 9979578211. The next prime is 9979578229. The reversal of 9979578228 is 8228759799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9979578229) 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, 272976 + ... + 307367.

It is an arithmetic number, because the mean of its divisors is an integer number (970915512).

Almost surely, 2^9979578228 is an apocalyptic number.

It is an amenable number.

9979578228 is an abundant number, since it is smaller than the sum of its proper divisors (13322394060).

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

9979578228 is a wasteful number, since it uses less digits than its factorization.

9979578228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581783 (or 581781 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 66.

The square root of 9979578228 is about 99897.8389556050. The cubic root of 9979578228 is about 2152.9671114252.

The spelling of 9979578228 in words is "nine billion, nine hundred seventy-nine million, five hundred seventy-eight thousand, two hundred twenty-eight".