198408156 has 48 divisors (see below), whose sum is σ = 492772896. Its totient is φ = 61917184.

The previous prime is 198408113. The next prime is 198408193. The reversal of 198408156 is 651804891.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37720 + ... + 42656.

It is an arithmetic number, because the mean of its divisors is an integer number (10266102).

Almost surely, 2^198408156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198408156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246386448).

198408156 is an abundant number, since it is smaller than the sum of its proper divisors (294364740).

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

198408156 is a wasteful number, since it uses less digits than its factorization.

198408156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5158 (or 5156 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 198408156 is about 14085.7430048968. The cubic root of 198408156 is about 583.2478863324.

The spelling of 198408156 in words is "one hundred ninety-eight million, four hundred eight thousand, one hundred fifty-six".