998981092 has 12 divisors (see below), whose sum is σ = 1748847996. Its totient is φ = 499310240.

The previous prime is 998981077. The next prime is 998981101. The reversal of 998981092 is 290189899.

It can be written as a sum of positive squares in 2 ways, for example, as 775956736 + 223024356 = 27856^2 + 14934^2 .

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, 32203 + ... + 55090.

It is an arithmetic number, because the mean of its divisors is an integer number (145737333).

Almost surely, 2^998981092 is an apocalyptic number.

It is an amenable number.

998981092 is a deficient number, since it is larger than the sum of its proper divisors (749866904).

998981092 is a wasteful number, since it uses less digits than its factorization.

998981092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90158 (or 90156 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 55.

The square root of 998981092 is about 31606.6621458198. The cubic root of 998981092 is about 999.6602485820.

The spelling of 998981092 in words is "nine hundred ninety-eight million, nine hundred eighty-one thousand, ninety-two".