198212742 has 144 divisors (see below), whose sum is σ = 548992080. Its totient is φ = 51214464.

The previous prime is 198212723. The next prime is 198212743. The reversal of 198212742 is 247212891.

198212742 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 198212697 and 198212706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198212743) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 676348 + ... + 676640.

It is an arithmetic number, because the mean of its divisors is an integer number (3812445).

Almost surely, 2^198212742 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198212742, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274496040).

198212742 is an abundant number, since it is smaller than the sum of its proper divisors (350779338).

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

198212742 is a wasteful number, since it uses less digits than its factorization.

198212742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387 (or 377 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 198212742 is about 14078.8047077868. The cubic root of 198212742 is about 583.0563413819.

The spelling of 198212742 in words is "one hundred ninety-eight million, two hundred twelve thousand, seven hundred forty-two".