198785536 has 20 divisors (see below), whose sum is σ = 397183842. Its totient is φ = 99392512.

The previous prime is 198785533. The next prime is 198785579. The reversal of 198785536 is 635587891.

It can be written as a sum of positive squares in only one way, i.e., 111175936 + 87609600 = 10544^2 + 9360^2 .

It is not an unprimeable number, because it can be changed into a prime (198785533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193615 + ... + 194638.

Almost surely, 2^198785536 is an apocalyptic number.

198785536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

198785536 is a deficient number, since it is larger than the sum of its proper divisors (198398306).

198785536 is an frugal number, since it uses more digits than its factorization.

198785536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388271 (or 388255 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 52.

The square root of 198785536 is about 14099.1324555804. The cubic root of 198785536 is about 583.6174388228.

It can be divided in two parts, 1987855 and 36, that added together give a palindrome (1987891).

The spelling of 198785536 in words is "one hundred ninety-eight million, seven hundred eighty-five thousand, five hundred thirty-six".