198936815 has 48 divisors (see below), whose sum is σ = 306470304. Its totient is φ = 122572800.

The previous prime is 198936811. The next prime is 198936847. The reversal of 198936815 is 518639891.

It is a happy number.

It is not a de Polignac number, because 198936815 - 2² = 198936811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198936811) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 261035 + ... + 261795.

It is an arithmetic number, because the mean of its divisors is an integer number (6384798).

Almost surely, 2^198936815 is an apocalyptic number.

198936815 is a deficient number, since it is larger than the sum of its proper divisors (107533489).

198936815 is a wasteful number, since it uses less digits than its factorization.

198936815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888 (or 881 counting only the distinct ones).

The product of its digits is 466560, while the sum is 50.

The square root of 198936815 is about 14104.4962689208. The cubic root of 198936815 is about 583.7654487121.

The spelling of 198936815 in words is "one hundred ninety-eight million, nine hundred thirty-six thousand, eight hundred fifteen".