998910018 has 24 divisors (see below), whose sum is σ = 2180108268. Its totient is φ = 330538752.

The previous prime is 998909969. The next prime is 998910041. The reversal of 998910018 is 810019899.

It can be written as a sum of positive squares in 2 ways, for example, as 986399649 + 12510369 = 31407^2 + 3537^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 200071 + ... + 205002.

Almost surely, 2^998910018 is an apocalyptic number.

998910018 is an abundant number, since it is smaller than the sum of its proper divisors (1181198250).

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

998910018 is a wasteful number, since it uses less digits than its factorization.

998910018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405218 (or 405215 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 45.

The square root of 998910018 is about 31605.5377742572. The cubic root of 998910018 is about 999.6365405799.

The spelling of 998910018 in words is "nine hundred ninety-eight million, nine hundred ten thousand, eighteen".