998128862 has 16 divisors (see below), whose sum is σ = 1576910160.
Its totient is φ = 472522752.
The previous prime is 998128847. The next prime is 998128889. The reversal of 998128862 is 268821899.
It is a super-2 number, since 2×9981288622 = 1992522450314830088, which contains 22 as substring.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68318 + ... + 81630.
It is an arithmetic number, because the mean of its divisors is an integer number (98556885).
Almost surely, 2998128862 is an apocalyptic number.
998128862 is a deficient number, since it is larger than the sum of its proper divisors (578781298).
998128862 is a wasteful number, since it uses less digits than its factorization.
998128862 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 15307.
The product of its digits is 995328, while the sum is 53.
The square root of 998128862 is about 31593.1774596985.
The cubic root of 998128862 is about 999.3758979109.
The spelling of 998128862 in words is "nine hundred ninety-eight million, one hundred twenty-eight thousand, eight hundred sixty-two".