198668368 has 10 divisors (see below), whose sum is σ = 384919994. Its totient is φ = 99334176.

The previous prime is 198668339. The next prime is 198668369. The reversal of 198668368 is 863866891.

It is a happy number.

198668368 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 only one way, i.e., 137077264 + 61591104 = 11708^2 + 7848^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198668369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6208371 + ... + 6208402.

Almost surely, 2^198668368 is an apocalyptic number.

It is an amenable number.

198668368 is a deficient number, since it is larger than the sum of its proper divisors (186251626).

198668368 is a wasteful number, since it uses less digits than its factorization.

198668368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12416781 (or 12416775 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 55.

The square root of 198668368 is about 14094.9766938438. The cubic root of 198668368 is about 583.5027511902.

The spelling of 198668368 in words is "one hundred ninety-eight million, six hundred sixty-eight thousand, three hundred sixty-eight".