8219999128 has 16 divisors (see below), whose sum is σ = 16813634760. Its totient is φ = 3736363200.

The previous prime is 8219999113. The next prime is 8219999147.

8219999128 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46704453 + ... + 46704628.

Almost surely, 2^8219999128 is an apocalyptic number.

8219999128 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

8219999128 is an abundant number, since it is smaller than the sum of its proper divisors (8593635632).

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

8219999128 is a wasteful number, since it uses less digits than its factorization.

8219999128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93409098 (or 93409094 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 58.

The square root of 8219999128 is about 90664.2108441914. The cubic root of 8219999128 is about 2018.1677277873.

The spelling of 8219999128 in words is "eight billion, two hundred nineteen million, nine hundred ninety-nine thousand, one hundred twenty-eight".