198580442 has 4 divisors (see below), whose sum is σ = 297870666. Its totient is φ = 99290220.

The previous prime is 198580439. The next prime is 198580567. The reversal of 198580442 is 244085891.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 133148521 + 65431921 = 11539^2 + 8089^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 198580442.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49645109 + ... + 49645112.

Almost surely, 2^198580442 is an apocalyptic number.

198580442 is a deficient number, since it is larger than the sum of its proper divisors (99290224).

198580442 is an equidigital number, since it uses as much as digits as its factorization.

198580442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99290223.

The product of its (nonzero) digits is 92160, while the sum is 41.

The square root of 198580442 is about 14091.8572941965. The cubic root of 198580442 is about 583.4166569047.

The spelling of 198580442 in words is "one hundred ninety-eight million, five hundred eighty thousand, four hundred forty-two".