198729644 has 12 divisors (see below), whose sum is σ = 350112000. Its totient is φ = 98697648.

The previous prime is 198729611. The next prime is 198729659. The reversal of 198729644 is 446927891.

It is a junction number, because it is equal to n+sod(n) for n = 198729592 and 198729601.

It is an unprimeable number.

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, 166124 + ... + 167315.

It is an arithmetic number, because the mean of its divisors is an integer number (29176000).

Almost surely, 2^198729644 is an apocalyptic number.

It is an amenable number.

198729644 is a deficient number, since it is larger than the sum of its proper divisors (151382356).

198729644 is a wasteful number, since it uses less digits than its factorization.

198729644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333592 (or 333590 counting only the distinct ones).

The product of its digits is 870912, while the sum is 50.

The square root of 198729644 is about 14097.1502084641. The cubic root of 198729644 is about 583.5627356417.

The spelling of 198729644 in words is "one hundred ninety-eight million, seven hundred twenty-nine thousand, six hundred forty-four".