198815 has 8 divisors (see below), whose sum is σ = 252720. Its totient is φ = 149632.

The previous prime is 198811. The next prime is 198817. The reversal of 198815 is 518891.

It is a happy number.

198815 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 198815 - 2² = 198811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1085 + ... + 1254.

It is an arithmetic number, because the mean of its divisors is an integer number (31590).

2¹⁹⁸⁸¹⁵ is an apocalyptic number.

198815 is a deficient number, since it is larger than the sum of its proper divisors (53905).

198815 is a wasteful number, since it uses less digits than its factorization.

198815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2361.

The product of its digits is 2880, while the sum is 32.

The square root of 198815 is about 445.8867569238. The cubic root of 198815 is about 58.3646271998.

The spelling of 198815 in words is "one hundred ninety-eight thousand, eight hundred fifteen".