198278773 has 8 divisors (see below), whose sum is σ = 247204800. Its totient is φ = 154502880.

The previous prime is 198278753. The next prime is 198278797. The reversal of 198278773 is 377872891.

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

It is not a de Polignac number, because 198278773 - 2⁹ = 198278261 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 198278773.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198278753) 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, 1287448 + ... + 1287601.

It is an arithmetic number, because the mean of its divisors is an integer number (30900600).

Almost surely, 2^198278773 is an apocalyptic number.

It is an amenable number.

198278773 is a deficient number, since it is larger than the sum of its proper divisors (48926027).

198278773 is a wasteful number, since it uses less digits than its factorization.

198278773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2575067.

The product of its digits is 1185408, while the sum is 52.

The square root of 198278773 is about 14081.1495624470. The cubic root of 198278773 is about 583.1210790951.

The spelling of 198278773 in words is "one hundred ninety-eight million, two hundred seventy-eight thousand, seven hundred seventy-three".