198278486 has 16 divisors (see below), whose sum is σ = 349093536. Its totient is φ = 82679616.

The previous prime is 198278473. The next prime is 198278489. The reversal of 198278486 is 684872891.

It is a happy number.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198278489) 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 7 ways as a sum of consecutive naturals, for example, 190871 + ... + 191906.

It is an arithmetic number, because the mean of its divisors is an integer number (21818346).

Almost surely, 2^198278486 is an apocalyptic number.

198278486 is a deficient number, since it is larger than the sum of its proper divisors (150815050).

198278486 is a wasteful number, since it uses less digits than its factorization.

198278486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382823.

The product of its digits is 1548288, while the sum is 53.

The square root of 198278486 is about 14081.1393715139. The cubic root of 198278486 is about 583.1207977474.

The spelling of 198278486 in words is "one hundred ninety-eight million, two hundred seventy-eight thousand, four hundred eighty-six".