198406915 has 16 divisors (see below), whose sum is σ = 288107712. Its totient is φ = 128047104.

The previous prime is 198406907. The next prime is 198406927. The reversal of 198406915 is 519604891.

It is a cyclic number.

It is not a de Polignac number, because 198406915 - 2³ = 198406907 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166134 + ... + 167323.

It is an arithmetic number, because the mean of its divisors is an integer number (18006732).

Almost surely, 2^198406915 is an apocalyptic number.

198406915 is a deficient number, since it is larger than the sum of its proper divisors (89700797).

198406915 is a wasteful number, since it uses less digits than its factorization.

198406915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333486.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 198406915 is about 14085.6989531936. The cubic root of 198406915 is about 583.2466703001.

The spelling of 198406915 in words is "one hundred ninety-eight million, four hundred six thousand, nine hundred fifteen".