198445930 has 16 divisors (see below), whose sum is σ = 378214920. Its totient is φ = 74708992.

The previous prime is 198445889. The next prime is 198445931. The reversal of 198445930 is 39544891.

It is a happy number.

198445930 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 129937201 + 68508729 = 11399^2 + 8277^2 .

It is not an unprimeable number, because it can be changed into a prime (198445931) 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, 583495 + ... + 583834.

Almost surely, 2^198445930 is an apocalyptic number.

198445930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198445930 is a deficient number, since it is larger than the sum of its proper divisors (179768990).

198445930 is a wasteful number, since it uses less digits than its factorization.

198445930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1167353.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 198445930 is about 14087.0838004180. The cubic root of 198445930 is about 583.2848979285.

The spelling of 198445930 in words is "one hundred ninety-eight million, four hundred forty-five thousand, nine hundred thirty".