190998 has 28 divisors (see below), whose sum is σ = 432828. Its totient is φ = 63180.

The previous prime is 190997. The next prime is 191021. The reversal of 190998 is 899091.

190998 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 9.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 190998.

It is not an unprimeable number, because it can be changed into a prime (190997) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 1393 + ... + 1523.

2¹⁹⁰⁹⁹⁸ is an apocalyptic number.

190998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 190998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216414).

190998 is an abundant number, since it is smaller than the sum of its proper divisors (241830).

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

190998 is an equidigital number, since it uses as much as digits as its factorization.

190998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 190998 is about 437.0331795184. The cubic root of 190998 is about 57.5894511932.

The spelling of 190998 in words is "one hundred ninety thousand, nine hundred ninety-eight".