998133438 has 64 divisors (see below), whose sum is σ = 2166538752. Its totient is φ = 305733120.

The previous prime is 998133421. The next prime is 998133439. The reversal of 998133438 is 834331899.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998133439) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 377770 + ... + 380402.

It is an arithmetic number, because the mean of its divisors is an integer number (33852168).

Almost surely, 2^998133438 is an apocalyptic number.

998133438 is an abundant number, since it is smaller than the sum of its proper divisors (1168405314).

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

998133438 is a wasteful number, since it uses less digits than its factorization.

998133438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2769.

The product of its digits is 559872, while the sum is 48.

The square root of 998133438 is about 31593.2498803146. The cubic root of 998133438 is about 999.3774251477.

The spelling of 998133438 in words is "nine hundred ninety-eight million, one hundred thirty-three thousand, four hundred thirty-eight".