198394407 has 16 divisors (see below), whose sum is σ = 301862880. Its totient is φ = 128687616.

The previous prime is 198394397. The next prime is 198394411. The reversal of 198394407 is 704493891.

198394407 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 198394407 - 2²⁰ = 197345831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198394487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98298 + ... + 100295.

It is an arithmetic number, because the mean of its divisors is an integer number (18866430).

Almost surely, 2^198394407 is an apocalyptic number.

198394407 is a deficient number, since it is larger than the sum of its proper divisors (103468473).

198394407 is a wasteful number, since it uses less digits than its factorization.

198394407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198639 (or 198633 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 198394407 is about 14085.2549497693. The cubic root of 198394407 is about 583.2344136664.

The spelling of 198394407 in words is "one hundred ninety-eight million, three hundred ninety-four thousand, four hundred seven".