198394825 has 12 divisors (see below), whose sum is σ = 246717468. Its totient is φ = 158259200.

The previous prime is 198394793. The next prime is 198394853. The reversal of 198394825 is 528493891.

It can be written as a sum of positive squares in 6 ways, for example, as 42719296 + 155675529 = 6536^2 + 12477^2 .

It is not a de Polignac number, because 198394825 - 2⁵ = 198394793 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2416 + ... + 20065.

It is an arithmetic number, because the mean of its divisors is an integer number (20559789).

Almost surely, 2^198394825 is an apocalyptic number.

It is an amenable number.

198394825 is a deficient number, since it is larger than the sum of its proper divisors (48322643).

198394825 is a wasteful number, since it uses less digits than its factorization.

198394825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22844 (or 22839 counting only the distinct ones).

The product of its digits is 622080, while the sum is 49.

The square root of 198394825 is about 14085.2697879735. The cubic root of 198394825 is about 583.2348232744.

The spelling of 198394825 in words is "one hundred ninety-eight million, three hundred ninety-four thousand, eight hundred twenty-five".