198261616 has 80 divisors (see below), whose sum is σ = 479969280. Its totient is φ = 77368320.

The previous prime is 198261611. The next prime is 198261617. The reversal of 198261616 is 616162891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198261611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57345 + ... + 60703.

It is an arithmetic number, because the mean of its divisors is an integer number (5999616).

Almost surely, 2^198261616 is an apocalyptic number.

198261616 is a gapful number since it is divisible by the number (16) 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 198261616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239984640).

198261616 is an abundant number, since it is smaller than the sum of its proper divisors (281707664).

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

198261616 is a wasteful number, since it uses less digits than its factorization.

198261616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3422 (or 3416 counting only the distinct ones).

The product of its digits is 31104, while the sum is 40.

The square root of 198261616 is about 14080.5403305413. The cubic root of 198261616 is about 583.1042595153.

The spelling of 198261616 in words is "one hundred ninety-eight million, two hundred sixty-one thousand, six hundred sixteen".