198406895 has 8 divisors (see below), whose sum is σ = 239323056. Its totient is φ = 157902336.

The previous prime is 198406877. The next prime is 198406907. The reversal of 198406895 is 598604891.

It is a happy number.

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 198406895 - 2¹⁶ = 198341359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101837 + ... + 103766.

It is an arithmetic number, because the mean of its divisors is an integer number (29915382).

Almost surely, 2^198406895 is an apocalyptic number.

198406895 is a deficient number, since it is larger than the sum of its proper divisors (40916161).

198406895 is a wasteful number, since it uses less digits than its factorization.

198406895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205801.

The product of its (nonzero) digits is 622080, while the sum is 50.

The square root of 198406895 is about 14085.6982432537. The cubic root of 198406895 is about 583.2466507025.

The spelling of 198406895 in words is "one hundred ninety-eight million, four hundred six thousand, eight hundred ninety-five".