998843868 has 108 divisors (see below), whose sum is σ = 2871315720. Its totient is φ = 292205760.

The previous prime is 998843831. The next prime is 998843869. The reversal of 998843868 is 868348899.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998843869) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 122371 + ... + 130277.

Almost surely, 2^998843868 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 998843868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1435657860).

998843868 is an abundant number, since it is smaller than the sum of its proper divisors (1872471852).

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

998843868 is a wasteful number, since it uses less digits than its factorization.

998843868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7968 (or 7952 counting only the distinct ones).

The product of its digits is 23887872, while the sum is 63.

The square root of 998843868 is about 31604.4912631101. The cubic root of 998843868 is about 999.6144740555.

The spelling of 998843868 in words is "nine hundred ninety-eight million, eight hundred forty-three thousand, eight hundred sixty-eight".