198973490 has 8 divisors (see below), whose sum is σ = 358152300. Its totient is φ = 79589392.

The previous prime is 198973487. The next prime is 198973499. The reversal of 198973490 is 94379891.

It can be written as a sum of positive squares in 2 ways, for example, as 195244729 + 3728761 = 13973^2 + 1931^2 .

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

It is not an unprimeable number, because it can be changed into a prime (198973499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9948665 + ... + 9948684.

Almost surely, 2^198973490 is an apocalyptic number.

198973490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198973490 is a deficient number, since it is larger than the sum of its proper divisors (159178810).

198973490 is a wasteful number, since it uses less digits than its factorization.

198973490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19897356.

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 198973490 is about 14105.7963263334. The cubic root of 198973490 is about 583.8013198710.

The spelling of 198973490 in words is "one hundred ninety-eight million, nine hundred seventy-three thousand, four hundred ninety".