998000000 has 112 divisors (see below), whose sum is σ = 2490202500. Its totient is φ = 398400000.

The previous prime is 997999963. The next prime is 998000027. The reversal of 998000000 is 899.

It is a happy number.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 1999751 + ... + 2000249.

Almost surely, 2^998000000 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 998000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1245101250).

998000000 is an abundant number, since it is smaller than the sum of its proper divisors (1492202500).

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

998000000 is an frugal number, since it uses more digits than its factorization.

998000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543 (or 506 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 998000000 is about 31591.1379978626. The cubic root of 998000000 is about 999.3328883944.

Adding to 998000000 its reverse (899), we get a palindrome (998000899).

The spelling of 998000000 in words is "nine hundred ninety-eight million", and thus it is an aban number.