9899222388 has 48 divisors (see below), whose sum is σ = 25231825920. Its totient is φ = 2995740000.

The previous prime is 9899222381. The next prime is 9899222401. The reversal of 9899222388 is 8832229989.

It is a hoax number, since the sum of its digits (60) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9899222381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49203 + ... + 149061.

It is an arithmetic number, because the mean of its divisors is an integer number (525663040).

Almost surely, 2^9899222388 is an apocalyptic number.

It is an amenable number.

9899222388 is an abundant number, since it is smaller than the sum of its proper divisors (15332603532).

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

9899222388 is a wasteful number, since it uses less digits than its factorization.

9899222388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100628 (or 100626 counting only the distinct ones).

The product of its digits is 8957952, while the sum is 60.

The square root of 9899222388 is about 99494.8359865978. The cubic root of 9899222388 is about 2147.1729483157.

The spelling of 9899222388 in words is "nine billion, eight hundred ninety-nine million, two hundred twenty-two thousand, three hundred eighty-eight".