199818498 has 64 divisors (see below), whose sum is σ = 454164480. Its totient is φ = 58060800.

The previous prime is 199818469. The next prime is 199818517. The reversal of 199818498 is 894818991.

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, 259458 + ... + 260226.

It is an arithmetic number, because the mean of its divisors is an integer number (7096320).

Almost surely, 2^199818498 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199818498, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (227082240).

199818498 is an abundant number, since it is smaller than the sum of its proper divisors (254345982).

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

199818498 is a wasteful number, since it uses less digits than its factorization.

199818498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943.

The product of its digits is 1492992, while the sum is 57.

The square root of 199818498 is about 14135.7171024324. The cubic root of 199818498 is about 584.6265890787.

The spelling of 199818498 in words is "one hundred ninety-nine million, eight hundred eighteen thousand, four hundred ninety-eight".