198818436 has 24 divisors (see below), whose sum is σ = 471774240. Its totient is φ = 65149312.

The previous prime is 198818429. The next prime is 198818437. The reversal of 198818436 is 634818891.

It is not an unprimeable number, because it can be changed into a prime (198818437) 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, 139701 + ... + 141116.

It is an arithmetic number, because the mean of its divisors is an integer number (19657260).

Almost surely, 2^198818436 is an apocalyptic number.

It is an amenable number.

198818436 is an abundant number, since it is smaller than the sum of its proper divisors (272955804).

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

198818436 is a wasteful number, since it uses less digits than its factorization.

198818436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280883 (or 280881 counting only the distinct ones).

The product of its digits is 331776, while the sum is 48.

The square root of 198818436 is about 14100.2991457628. The cubic root of 198818436 is about 583.6496342480.

The spelling of 198818436 in words is "one hundred ninety-eight million, eight hundred eighteen thousand, four hundred thirty-six".