198724455 has 16 divisors (see below), whose sum is σ = 353288160. Its totient is φ = 105986304.

The previous prime is 198724453. The next prime is 198724459. The reversal of 198724455 is 554427891.

198724455 is a `hidden beast` number, since 198 + 7 + 2 + 4 + 455 = 666.

It is not a de Polignac number, because 198724455 - 2¹ = 198724453 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 198724455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198724453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 735882 + ... + 736151.

It is an arithmetic number, because the mean of its divisors is an integer number (22080510).

Almost surely, 2^198724455 is an apocalyptic number.

198724455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

198724455 is a deficient number, since it is larger than the sum of its proper divisors (154563705).

198724455 is a wasteful number, since it uses less digits than its factorization.

198724455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1472047 (or 1472041 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 198724455 is about 14096.9661629728. The cubic root of 198724455 is about 583.5576564910.

The spelling of 198724455 in words is "one hundred ninety-eight million, seven hundred twenty-four thousand, four hundred fifty-five".