992189988 has 18 divisors (see below), whose sum is σ = 2508035894. Its totient is φ = 330729984.

The previous prime is 992189977. The next prime is 992190007. The reversal of 992189988 is 889981299.

992189988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 888516864 + 103673124 = 29808^2 + 10182^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13780381 + ... + 13780452.

Almost surely, 2^992189988 is an apocalyptic number.

It is an amenable number.

992189988 is an abundant number, since it is smaller than the sum of its proper divisors (1515845906).

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

992189988 is a wasteful number, since it uses less digits than its factorization.

992189988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27560843 (or 27560838 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 63.

The square root of 992189988 is about 31499.0474141679. The cubic root of 992189988 is about 997.3898557411.

The spelling of 992189988 in words is "nine hundred ninety-two million, one hundred eighty-nine thousand, nine hundred eighty-eight".