198076644 has 72 divisors (see below), whose sum is σ = 536985120. Its totient is φ = 63136656.

The previous prime is 198076643. The next prime is 198076657. The reversal of 198076644 is 446670891.

It is a self number, because there is not a number n which added to its sum of digits gives 198076644.

It is not an unprimeable number, because it can be changed into a prime (198076643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55399 + ... + 58865.

Almost surely, 2^198076644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198076644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268492560).

198076644 is an abundant number, since it is smaller than the sum of its proper divisors (338908476).

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

198076644 is a wasteful number, since it uses less digits than its factorization.

198076644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3526 (or 3495 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 198076644 is about 14073.9704419187. The cubic root of 198076644 is about 582.9228636348.

The spelling of 198076644 in words is "one hundred ninety-eight million, seventy-six thousand, six hundred forty-four".