198959720 has 32 divisors (see below), whose sum is σ = 463098600. Its totient is φ = 76839168.

The previous prime is 198959713. The next prime is 198959723. The reversal of 198959720 is 27959891.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 197514916 + 1444804 = 14054^2 + 1202^2 .

It is not an unprimeable number, because it can be changed into a prime (198959723) 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, 84599 + ... + 86918.

Almost surely, 2^198959720 is an apocalyptic number.

198959720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198959720 is an abundant number, since it is smaller than the sum of its proper divisors (264138880).

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

198959720 is a wasteful number, since it uses less digits than its factorization.

198959720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171557 (or 171553 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 50.

The square root of 198959720 is about 14105.3082206664. The cubic root of 198959720 is about 583.7878521981.

The spelling of 198959720 in words is "one hundred ninety-eight million, nine hundred fifty-nine thousand, seven hundred twenty".