198938015 has 4 divisors (see below), whose sum is σ = 238725624. Its totient is φ = 159150408.

The previous prime is 198937987. The next prime is 198938021. The reversal of 198938015 is 510839891.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 198938015 - 2⁸ = 198937759 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 3 ways as a sum of consecutive naturals, for example, 19893797 + ... + 19893806.

It is an arithmetic number, because the mean of its divisors is an integer number (59681406).

Almost surely, 2^198938015 is an apocalyptic number.

198938015 is a deficient number, since it is larger than the sum of its proper divisors (39787609).

198938015 is an equidigital number, since it uses as much as digits as its factorization.

198938015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39787608.

The product of its (nonzero) digits is 77760, while the sum is 44.

The square root of 198938015 is about 14104.5388084829. The cubic root of 198938015 is about 583.7666224803.

It can be divided in two parts, 1989 and 38015, that added together give a palindrome (40004).

The spelling of 198938015 in words is "one hundred ninety-eight million, nine hundred thirty-eight thousand, fifteen".