198193910 has 8 divisors (see below), whose sum is σ = 356749056. Its totient is φ = 79277560.

The previous prime is 198193889. The next prime is 198193949. The reversal of 198193910 is 19391891.

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 2×198193910² = 78561651922176200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9909686 + ... + 9909705.

It is an arithmetic number, because the mean of its divisors is an integer number (44593632).

Almost surely, 2^198193910 is an apocalyptic number.

198193910 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198193910 is a deficient number, since it is larger than the sum of its proper divisors (158555146).

198193910 is a wasteful number, since it uses less digits than its factorization.

198193910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19819398.

The product of its (nonzero) digits is 17496, while the sum is 41.

The square root of 198193910 is about 14078.1358851234. The cubic root of 198193910 is about 583.0378755916.

The spelling of 198193910 in words is "one hundred ninety-eight million, one hundred ninety-three thousand, nine hundred ten".