198000642 has 16 divisors (see below), whose sum is σ = 452572992. Its totient is φ = 56571600.

The previous prime is 198000619. The next prime is 198000697. The reversal of 198000642 is 246000891.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2357109 + ... + 2357192.

It is an arithmetic number, because the mean of its divisors is an integer number (28285812).

Almost surely, 2^198000642 is an apocalyptic number.

198000642 is an abundant number, since it is smaller than the sum of its proper divisors (254572350).

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

198000642 is a wasteful number, since it uses less digits than its factorization.

198000642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4714313.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 198000642 is about 14071.2700919284. The cubic root of 198000642 is about 582.8482982709.

The spelling of 198000642 in words is "one hundred ninety-eight million, six hundred forty-two", and thus it is an aban number.