999798000 has 160 divisors (see below), whose sum is σ = 3240274752. Its totient is φ = 265216000.

The previous prime is 999797987. The next prime is 999798001. The reversal of 999798000 is 897999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999798001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1685704 + ... + 1686296.

Almost surely, 2^999798000 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 999798000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1620137376).

999798000 is an abundant number, since it is smaller than the sum of its proper divisors (2240476752).

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

999798000 is a wasteful number, since it uses less digits than its factorization.

999798000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900 (or 884 counting only the distinct ones).

The product of its (nonzero) digits is 367416, while the sum is 51.

The square root of 999798000 is about 31619.5825399388. The cubic root of 999798000 is about 999.9326621324.

The spelling of 999798000 in words is "nine hundred ninety-nine million, seven hundred ninety-eight thousand".