198685030 has 8 divisors (see below), whose sum is σ = 357633072. Its totient is φ = 79474008.

The previous prime is 198685021. The next prime is 198685031. The reversal of 198685030 is 30586891.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×198685030² = 78951482292201800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198685031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9934242 + ... + 9934261.

It is an arithmetic number, because the mean of its divisors is an integer number (44704134).

Almost surely, 2^198685030 is an apocalyptic number.

198685030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198685030 is a deficient number, since it is larger than the sum of its proper divisors (158948042).

198685030 is a wasteful number, since it uses less digits than its factorization.

198685030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19868510.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 198685030 is about 14095.5677430886. The cubic root of 198685030 is about 583.5190632167.

The spelling of 198685030 in words is "one hundred ninety-eight million, six hundred eighty-five thousand, thirty".