998683992 has 80 divisors (see below), whose sum is σ = 2812233600. Its totient is φ = 331110720.

The previous prime is 998683981. The next prime is 998684017. The reversal of 998683992 is 299386899.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 119734 + ... + 127802.

It is an arithmetic number, because the mean of its divisors is an integer number (35152920).

Almost surely, 2^998683992 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 998683992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1406116800).

998683992 is an abundant number, since it is smaller than the sum of its proper divisors (1813549608).

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

998683992 is a wasteful number, since it uses less digits than its factorization.

998683992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8278 (or 8265 counting only the distinct ones).

The product of its digits is 15116544, while the sum is 63.

The square root of 998683992 is about 31601.9618378353. The cubic root of 998683992 is about 999.5611380951.

The spelling of 998683992 in words is "nine hundred ninety-eight million, six hundred eighty-three thousand, nine hundred ninety-two".