198155052 has 48 divisors (see below), whose sum is σ = 517816320. Its totient is φ = 65527056.

The previous prime is 198155033. The next prime is 198155059. The reversal of 198155052 is 250551891.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 198154998 and 198155016.

It is not an unprimeable number, because it can be changed into a prime (198155059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6493 + ... + 20939.

It is an arithmetic number, because the mean of its divisors is an integer number (10787840).

Almost surely, 2^198155052 is an apocalyptic number.

198155052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198155052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258908160).

198155052 is an abundant number, since it is smaller than the sum of its proper divisors (319661268).

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

198155052 is a wasteful number, since it uses less digits than its factorization.

198155052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14587 (or 14579 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 36.

The square root of 198155052 is about 14076.7557341882. The cubic root of 198155052 is about 582.9997695325. Note that the first 3 decimals are identical.

The spelling of 198155052 in words is "one hundred ninety-eight million, one hundred fifty-five thousand, fifty-two".