198151930 has 24 divisors (see below), whose sum is σ = 362254716. Its totient is φ = 78024960.

The previous prime is 198151901. The next prime is 198151937. The reversal of 198151930 is 39151891.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 50310649 + 147841281 = 7093^2 + 12159^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 198151930.

It is not an unprimeable number, because it can be changed into a prime (198151937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 380070 + ... + 380590.

Almost surely, 2^198151930 is an apocalyptic number.

198151930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198151930 is a deficient number, since it is larger than the sum of its proper divisors (164102786).

198151930 is an frugal number, since it uses more digits than its factorization.

198151930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122 (or 601 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 37.

The square root of 198151930 is about 14076.6448417228. The cubic root of 198151930 is about 582.9967077301.

The spelling of 198151930 in words is "one hundred ninety-eight million, one hundred fifty-one thousand, nine hundred thirty".