198730 has 32 divisors (see below), whose sum is σ = 435456. Its totient is φ = 63744.

The previous prime is 198719. The next prime is 198733. The reversal of 198730 is 37891.

It is a super-2 number, since 2×198730² = 78987225800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1107 + ... + 1273.

It is an arithmetic number, because the mean of its divisors is an integer number (13608).

2¹⁹⁸⁷³⁰ is an apocalyptic number.

198730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198730 is an abundant number, since it is smaller than the sum of its proper divisors (236726).

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

198730 is a wasteful number, since it uses less digits than its factorization.

198730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 198730 is about 445.7914310527. The cubic root of 198730 is about 58.3563084102.

The spelling of 198730 in words is "one hundred ninety-eight thousand, seven hundred thirty".