198599730 has 64 divisors (see below), whose sum is σ = 548425728. Its totient is φ = 45086400.

The previous prime is 198599719. The next prime is 198599749. The reversal of 198599730 is 37995891.

It is a happy number.

198599730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28579 + ... + 34841.

It is an arithmetic number, because the mean of its divisors is an integer number (8569152).

Almost surely, 2^198599730 is an apocalyptic number.

198599730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 198599730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274212864).

198599730 is an abundant number, since it is smaller than the sum of its proper divisors (349825998).

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

198599730 is a wasteful number, since it uses less digits than its factorization.

198599730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6431.

The product of its (nonzero) digits is 612360, while the sum is 51.

The square root of 198599730 is about 14092.5416444302. The cubic root of 198599730 is about 583.4355452639.

The spelling of 198599730 in words is "one hundred ninety-eight million, five hundred ninety-nine thousand, seven hundred thirty".