999998000 has 120 divisors (see below), whose sum is σ = 2515803264. Its totient is φ = 384048000.

The previous prime is 999997967. The next prime is 999998003. The reversal of 999998000 is 899999.

It is a happy number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (999998003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7873937 + ... + 7874063.

Almost surely, 2^999998000 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 999998000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1257901632).

999998000 is an abundant number, since it is smaller than the sum of its proper divisors (1515805264).

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

999998000 is a wasteful number, since it uses less digits than its factorization.

999998000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308 (or 165 counting only the distinct ones).

The product of its (nonzero) digits is 472392, while the sum is 53.

The square root of 999998000 is about 31622.7449788914. The cubic root of 999998000 is about 999.9993333329. Note that the first 3 decimals are identical.

The spelling of 999998000 in words is "nine hundred ninety-nine million, nine hundred ninety-eight thousand".