198210649 has 8 divisors (see below), whose sum is σ = 243951680. Its totient is φ = 156825936.

The previous prime is 198210647. The next prime is 198210689. The reversal of 198210649 is 946012891.

198210649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 198210649 - 2¹ = 198210647 is a prime.

It is a super-4 number, since 4×198210649⁴ (a number of 34 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (198210643) 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, 1088979 + ... + 1089160.

It is an arithmetic number, because the mean of its divisors is an integer number (30493960).

Almost surely, 2^198210649 is an apocalyptic number.

It is an amenable number.

198210649 is a deficient number, since it is larger than the sum of its proper divisors (45741031).

198210649 is a wasteful number, since it uses less digits than its factorization.

198210649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2178159.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 198210649 is about 14078.7303759963. The cubic root of 198210649 is about 583.0542891405.

The spelling of 198210649 in words is "one hundred ninety-eight million, two hundred ten thousand, six hundred forty-nine".