198884811 has 16 divisors (see below), whose sum is σ = 270616320. Its totient is φ = 129887520.

The previous prime is 198884801. The next prime is 198884821. The reversal of 198884811 is 118488891.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (198884801) and next prime (198884821).

It is not a de Polignac number, because 198884811 - 2⁹ = 198884299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198884801) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 53241 + ... + 56853.

It is an arithmetic number, because the mean of its divisors is an integer number (16913520).

Almost surely, 2^198884811 is an apocalyptic number.

198884811 is a deficient number, since it is larger than the sum of its proper divisors (71731509).

198884811 is a wasteful number, since it uses less digits than its factorization.

198884811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3986.

The product of its digits is 147456, while the sum is 48.

The square root of 198884811 is about 14102.6526228224. The cubic root of 198884811 is about 583.7145769749.

The spelling of 198884811 in words is "one hundred ninety-eight million, eight hundred eighty-four thousand, eight hundred eleven".