198416636 has 12 divisors (see below), whose sum is σ = 378795480. Its totient is φ = 90189360.

The previous prime is 198416633. The next prime is 198416723. The reversal of 198416636 is 636614891.

It is a happy number.

It is a super-2 number, since 2×198416636² = 78738322883112992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 4509469 = 198416636 / (1 + 9 + 8 + 4 + 1 + 6 + 6 + 3 + 6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198416633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2254691 + ... + 2254778.

It is an arithmetic number, because the mean of its divisors is an integer number (31566290).

Almost surely, 2^198416636 is an apocalyptic number.

It is an amenable number.

198416636 is a deficient number, since it is larger than the sum of its proper divisors (180378844).

198416636 is a wasteful number, since it uses less digits than its factorization.

198416636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4509484 (or 4509482 counting only the distinct ones).

The product of its digits is 186624, while the sum is 44.

The square root of 198416636 is about 14086.0440152656. The cubic root of 198416636 is about 583.2561955869.

The spelling of 198416636 in words is "one hundred ninety-eight million, four hundred sixteen thousand, six hundred thirty-six".