198166536 has 24 divisors (see below), whose sum is σ = 536701230. Its totient is φ = 66055488.

The previous prime is 198166531. The next prime is 198166537. The reversal of 198166536 is 635661891.

It can be written as a sum of positive squares in only one way, i.e., 144144036 + 54022500 = 12006^2 + 7350^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 198166491 and 198166500.

It is not an unprimeable number, because it can be changed into a prime (198166531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1376085 + ... + 1376228.

Almost surely, 2^198166536 is an apocalyptic number.

It is an amenable number.

198166536 is an abundant number, since it is smaller than the sum of its proper divisors (338534694).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

198166536 is a wasteful number, since it uses less digits than its factorization.

198166536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2752325 (or 2752318 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 198166536 is about 14077.1636347668. The cubic root of 198166536 is about 583.0110318243.

The spelling of 198166536 in words is "one hundred ninety-eight million, one hundred sixty-six thousand, five hundred thirty-six".