198293328 has 30 divisors (see below), whose sum is σ = 554946314. Its totient is φ = 66097728.

The previous prime is 198293279. The next prime is 198293377. The reversal of 198293328 is 823392891.

It is an interprime number because it is at equal distance from previous prime (198293279) and next prime (198293377).

It can be written as a sum of positive squares in only one way, i.e., 174556944 + 23736384 = 13212^2 + 4872^2 .

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 688375 + ... + 688662.

Almost surely, 2^198293328 is an apocalyptic number.

198293328 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

198293328 is an abundant number, since it is smaller than the sum of its proper divisors (356652986).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

198293328 is a wasteful number, since it uses less digits than its factorization.

198293328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1377051 (or 1377042 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 198293328 is about 14081.6663786641. Note that the first 3 decimals coincide. The cubic root of 198293328 is about 583.1353470867.

The spelling of 198293328 in words is "one hundred ninety-eight million, two hundred ninety-three thousand, three hundred twenty-eight".