998123828 has 24 divisors (see below), whose sum is σ = 1882131552. Its totient is φ = 460414944.

The previous prime is 998123821. The next prime is 998123831. The reversal of 998123828 is 828321899.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998123821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113651 + ... + 122117.

It is an arithmetic number, because the mean of its divisors is an integer number (78422148).

Almost surely, 2^998123828 is an apocalyptic number.

It is an amenable number.

998123828 is a deficient number, since it is larger than the sum of its proper divisors (884007724).

998123828 is a wasteful number, since it uses less digits than its factorization.

998123828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10751 (or 10749 counting only the distinct ones).

The product of its digits is 497664, while the sum is 50.

The square root of 998123828 is about 31593.0977904985. The cubic root of 998123828 is about 999.3742178117.

The spelling of 998123828 in words is "nine hundred ninety-eight million, one hundred twenty-three thousand, eight hundred twenty-eight".