998111900 has 36 divisors (see below), whose sum is σ = 2206780632. Its totient is φ = 391709760.

The previous prime is 998111899. The next prime is 998111927. The reversal of 998111900 is 9111899.

It is a happy number.

It is a super-2 number, since 2×998111900² = 1992454729843220000, 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 11 ways as a sum of consecutive naturals, for example, 88862 + ... + 99461.

It is an arithmetic number, because the mean of its divisors is an integer number (61299462).

Almost surely, 2^998111900 is an apocalyptic number.

It is an amenable number.

998111900 is an abundant number, since it is smaller than the sum of its proper divisors (1208668732).

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

998111900 is a wasteful number, since it uses less digits than its factorization.

998111900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188390 (or 188383 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 38.

The square root of 998111900 is about 31592.9090145241. The cubic root of 998111900 is about 999.3702368149.

The spelling of 998111900 in words is "nine hundred ninety-eight million, one hundred eleven thousand, nine hundred".