198649015 has 8 divisors (see below), whose sum is σ = 238536288. Its totient is φ = 158814240.

The previous prime is 198649007. The next prime is 198649021. The reversal of 198649015 is 510946891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 198649015 - 2³ = 198649007 is a prime.

It is a super-2 number, since 2×198649015² = 78922862320940450, which contains 22 as substring.

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 (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4251 + ... + 20380.

It is an arithmetic number, because the mean of its divisors is an integer number (29817036).

Almost surely, 2^198649015 is an apocalyptic number.

198649015 is a deficient number, since it is larger than the sum of its proper divisors (39887273).

198649015 is a wasteful number, since it uses less digits than its factorization.

198649015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26249.

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

The square root of 198649015 is about 14094.2901559461. The cubic root of 198649015 is about 583.4838035413.

The spelling of 198649015 in words is "one hundred ninety-eight million, six hundred forty-nine thousand, fifteen".