198406 has 12 divisors (see below), whose sum is σ = 322812. Its totient is φ = 91416.

The previous prime is 198397. The next prime is 198409. The reversal of 198406 is 604891.

198406 is nontrivially palindromic in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45 + ... + 631.

It is an arithmetic number, because the mean of its divisors is an integer number (26901).

2¹⁹⁸⁴⁰⁶ is an apocalyptic number.

198406 is a deficient number, since it is larger than the sum of its proper divisors (124406).

198406 is a wasteful number, since it uses less digits than its factorization.

198406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615 (or 602 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 198406 is about 445.4278841743. The cubic root of 198406 is about 58.3245773706.

The spelling of 198406 in words is "one hundred ninety-eight thousand, four hundred six".