198230865 has 64 divisors (see below), whose sum is σ = 373248000. Its totient is φ = 87969024.

The previous prime is 198230861. The next prime is 198230887. The reversal of 198230865 is 568032891.

It is not a de Polignac number, because 198230865 - 2² = 198230861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198230861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 996036 + ... + 996234.

It is an arithmetic number, because the mean of its divisors is an integer number (5832000).

Almost surely, 2^198230865 is an apocalyptic number.

198230865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

198230865 is a deficient number, since it is larger than the sum of its proper divisors (175017135).

198230865 is a wasteful number, since it uses less digits than its factorization.

198230865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446.

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 198230865 is about 14079.4483201580. The cubic root of 198230865 is about 583.0741108552.

The spelling of 198230865 in words is "one hundred ninety-eight million, two hundred thirty thousand, eight hundred sixty-five".