198438164 has 6 divisors (see below), whose sum is σ = 347266794. Its totient is φ = 99219080.

The previous prime is 198438157. The next prime is 198438167. The reversal of 198438164 is 461834891.

It can be written as a sum of positive squares in only one way, i.e., 176890000 + 21548164 = 13300^2 + 4642^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198438167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24804767 + ... + 24804774.

It is an arithmetic number, because the mean of its divisors is an integer number (57877799).

Almost surely, 2^198438164 is an apocalyptic number.

It is an amenable number.

198438164 is a deficient number, since it is larger than the sum of its proper divisors (148828630).

198438164 is a wasteful number, since it uses less digits than its factorization.

198438164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49609545 (or 49609543 counting only the distinct ones).

The product of its digits is 165888, while the sum is 44.

The square root of 198438164 is about 14086.8081551500. The cubic root of 198438164 is about 583.2772890556.

The spelling of 198438164 in words is "one hundred ninety-eight million, four hundred thirty-eight thousand, one hundred sixty-four".