198737856 has 84 divisors (see below), whose sum is σ = 576648072. Its totient is φ = 65432064.

The previous prime is 198737741. The next prime is 198737857. The reversal of 198737856 is 658737891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198737857) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45730 + ... + 49886.

It is an arithmetic number, because the mean of its divisors is an integer number (6864858).

Almost surely, 2^198737856 is an apocalyptic number.

198737856 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 198737856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288324036).

198737856 is an abundant number, since it is smaller than the sum of its proper divisors (377910216).

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

198737856 is a wasteful number, since it uses less digits than its factorization.

198737856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4258 (or 4245 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The square root of 198737856 is about 14097.4414699973. The cubic root of 198737856 is about 583.5707736157.

The spelling of 198737856 in words is "one hundred ninety-eight million, seven hundred thirty-seven thousand, eight hundred fifty-six".