198959220 has 48 divisors (see below), whose sum is σ = 618985920. Its totient is φ = 53055648.

The previous prime is 198959129. The next prime is 198959221. The reversal of 198959220 is 22959891.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198959221) 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, 183682 + ... + 184761.

It is an arithmetic number, because the mean of its divisors is an integer number (12895540).

Almost surely, 2^198959220 is an apocalyptic number.

198959220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198959220 is an abundant number, since it is smaller than the sum of its proper divisors (420026700).

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

198959220 is a wasteful number, since it uses less digits than its factorization.

198959220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368461 (or 368453 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 198959220 is about 14105.2904968313. The cubic root of 198959220 is about 583.7873631642.

The spelling of 198959220 in words is "one hundred ninety-eight million, nine hundred fifty-nine thousand, two hundred twenty".