8899779992 has 16 divisors (see below), whose sum is σ = 16874584200. Its totient is φ = 4399890880.

The previous prime is 8899779991. The next prime is 8899780009. The reversal of 8899779992 is 2999779988.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8899779991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6249134 + ... + 6250557.

Almost surely, 2^8899779992 is an apocalyptic number.

It is an amenable number.

8899779992 is a deficient number, since it is larger than the sum of its proper divisors (7974804208).

8899779992 is a wasteful number, since it uses less digits than its factorization.

8899779992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12499786 (or 12499782 counting only the distinct ones).

The product of its digits is 370355328, while the sum is 77.

The square root of 8899779992 is about 94338.6452732919. The cubic root of 8899779992 is about 2072.3340217455.

The spelling of 8899779992 in words is "eight billion, eight hundred ninety-nine million, seven hundred seventy-nine thousand, nine hundred ninety-two".