198445564 has 12 divisors (see below), whose sum is σ = 362379024. Its totient is φ = 94908704.

The previous prime is 198445561. The next prime is 198445567. The reversal of 198445564 is 465544891.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (198445561) and next prime (198445567).

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198445561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1078417 + ... + 1078600.

It is an arithmetic number, because the mean of its divisors is an integer number (30198252).

Almost surely, 2^198445564 is an apocalyptic number.

It is an amenable number.

198445564 is a deficient number, since it is larger than the sum of its proper divisors (163933460).

198445564 is a wasteful number, since it uses less digits than its factorization.

198445564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2157044 (or 2157042 counting only the distinct ones).

The product of its digits is 691200, while the sum is 46.

The square root of 198445564 is about 14087.0708097887. The cubic root of 198445564 is about 583.2845393382.

The spelling of 198445564 in words is "one hundred ninety-eight million, four hundred forty-five thousand, five hundred sixty-four".