998421146 has 16 divisors (see below), whose sum is σ = 1520116584. Its totient is φ = 491733504.

The previous prime is 998421133. The next prime is 998421163. The reversal of 998421146 is 641124899.

998421146 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 4 ways, for example, as 688485121 + 309936025 = 26239^2 + 17605^2 .

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 998421097 and 998421106.

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, 120530 + ... + 128546.

Almost surely, 2^998421146 is an apocalyptic number.

998421146 is a deficient number, since it is larger than the sum of its proper divisors (521695438).

998421146 is a wasteful number, since it uses less digits than its factorization.

998421146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8945.

The product of its digits is 124416, while the sum is 44.

The square root of 998421146 is about 31597.8028666551. The cubic root of 998421146 is about 999.4734381146.

The spelling of 998421146 in words is "nine hundred ninety-eight million, four hundred twenty-one thousand, one hundred forty-six".