198217140 has 96 divisors (see below), whose sum is σ = 621903744. Its totient is φ = 46748160.

The previous prime is 198217111. The next prime is 198217147. The reversal of 198217140 is 41712891.

198217140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198217147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20362 + ... + 28478.

It is an arithmetic number, because the mean of its divisors is an integer number (6478164).

Almost surely, 2^198217140 is an apocalyptic number.

198217140 is a gapful number since it is divisible by the number (10) 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 198217140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (310951872).

198217140 is an abundant number, since it is smaller than the sum of its proper divisors (423686604).

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

198217140 is a wasteful number, since it uses less digits than its factorization.

198217140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8177 (or 8175 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 33.

The square root of 198217140 is about 14078.9608991573. The cubic root of 198217140 is about 583.0606536893.

The spelling of 198217140 in words is "one hundred ninety-eight million, two hundred seventeen thousand, one hundred forty".