198404479 has 48 divisors (see below), whose sum is σ = 265893600. Its totient is φ = 147184128.

The previous prime is 198404473. The next prime is 198404489. The reversal of 198404479 is 974404891.

It is not a de Polignac number, because 198404479 - 2⁷ = 198404351 is a prime.

It is a super-2 number, since 2×198404479² = 78728674574522882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198404473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2045359 + ... + 2045455.

It is an arithmetic number, because the mean of its divisors is an integer number (5539450).

Almost surely, 2^198404479 is an apocalyptic number.

198404479 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

198404479 is a deficient number, since it is larger than the sum of its proper divisors (67489121).

198404479 is an equidigital number, since it uses as much as digits as its factorization.

198404479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 198404479 is about 14085.6124822458. The cubic root of 198404479 is about 583.2442832955.

The spelling of 198404479 in words is "one hundred ninety-eight million, four hundred four thousand, four hundred seventy-nine".