198882478 has 8 divisors (see below), whose sum is σ = 298524168. Its totient is φ = 99374424.

The previous prime is 198882469. The next prime is 198882479. The reversal of 198882478 is 874288891.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198882479) 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 3 ways as a sum of consecutive naturals, for example, 29601 + ... + 35692.

It is an arithmetic number, because the mean of its divisors is an integer number (37315521).

Almost surely, 2^198882478 is an apocalyptic number.

198882478 is a deficient number, since it is larger than the sum of its proper divisors (99641690).

198882478 is a wasteful number, since it uses less digits than its factorization.

198882478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66818.

The product of its digits is 2064384, while the sum is 55.

The square root of 198882478 is about 14102.5699076445. The cubic root of 198882478 is about 583.7122945626.

It can be divided in two parts, 19888 and 2478, that added together give a triangular number (22366 = T₂₁₁).

The spelling of 198882478 in words is "one hundred ninety-eight million, eight hundred eighty-two thousand, four hundred seventy-eight".