198620 has 12 divisors (see below), whose sum is σ = 417144. Its totient is φ = 79440.

The previous prime is 198613. The next prime is 198623. The reversal of 198620 is 26891.

It is a self number, because there is not a number n which added to its sum of digits gives 198620.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198623) by changing a digit.

198620 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4946 + ... + 4985.

It is an arithmetic number, because the mean of its divisors is an integer number (34762).

2¹⁹⁸⁶²⁰ is an apocalyptic number.

198620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198620 is an abundant number, since it is smaller than the sum of its proper divisors (218524).

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

198620 is a wasteful number, since it uses less digits than its factorization.

198620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9940 (or 9938 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 198620 is about 445.6680378937. The cubic root of 198620 is about 58.3455393959.

It can be divided in two parts, 198 and 620, that multiplied together give a triangular number (122760 = T₄₉₅).

The spelling of 198620 in words is "one hundred ninety-eight thousand, six hundred twenty".