998128808 has 16 divisors (see below), whose sum is σ = 1871883060. Its totient is φ = 498960000.

The previous prime is 998128753. The next prime is 998128823. The reversal of 998128808 is 808821899.

It can be written as a sum of positive squares in 2 ways, for example, as 894129604 + 103999204 = 29902^2 + 10198^2 .

It is a super-2 number, since 2×998128808² = 1992522234719001728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 998128808.

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, 40508 + ... + 60308.

Almost surely, 2^998128808 is an apocalyptic number.

It is an amenable number.

998128808 is a deficient number, since it is larger than the sum of its proper divisors (873754252).

998128808 is a wasteful number, since it uses less digits than its factorization.

998128808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26108 (or 26104 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 53.

The square root of 998128808 is about 31593.1766050836. The cubic root of 998128808 is about 999.3758798885.

The spelling of 998128808 in words is "nine hundred ninety-eight million, one hundred twenty-eight thousand, eight hundred eight".