198240371628 has 96 divisors (see below), whose sum is σ = 501314688000. Its totient is φ = 60609441024.

The previous prime is 198240371603. The next prime is 198240371629. The reversal of 198240371628 is 826173042891.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (198240371629) 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, 25731625 + ... + 25739327.

It is an arithmetic number, because the mean of its divisors is an integer number (5222028000).

Almost surely, 2^198240371628 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 198240371628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250657344000).

198240371628 is an abundant number, since it is smaller than the sum of its proper divisors (303074316372).

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

198240371628 is a wasteful number, since it uses less digits than its factorization.

198240371628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8751 (or 8749 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 51.

The spelling of 198240371628 in words is "one hundred ninety-eight billion, two hundred forty million, three hundred seventy-one thousand, six hundred twenty-eight".