198678280 has 32 divisors (see below), whose sum is σ = 447427800. Its totient is φ = 79399936.

The previous prime is 198678247. The next prime is 198678283. The reversal of 198678280 is 82876891.

It can be written as a sum of positive squares in 4 ways, for example, as 121484484 + 77193796 = 11022^2 + 8786^2 .

It is not an unprimeable number, because it can be changed into a prime (198678283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83994 + ... + 86326.

Almost surely, 2^198678280 is an apocalyptic number.

198678280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198678280 is an abundant number, since it is smaller than the sum of its proper divisors (248749520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

198678280 is a wasteful number, since it uses less digits than its factorization.

198678280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4473 (or 4469 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 49.

The square root of 198678280 is about 14095.3283040871. The cubic root of 198678280 is about 583.5124551056.

The spelling of 198678280 in words is "one hundred ninety-eight million, six hundred seventy-eight thousand, two hundred eighty".