198351828 has 60 divisors (see below), whose sum is σ = 519919092. Its totient is φ = 65940480.

The previous prime is 198351821. The next prime is 198351833. The reversal of 198351828 is 828153891.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 174556944 + 23794884 = 13212^2 + 4878^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198351821) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 186418 + ... + 187478.

Almost surely, 2^198351828 is an apocalyptic number.

198351828 is a gapful number since it is divisible by the number (18) 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 198351828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259959546).

198351828 is an abundant number, since it is smaller than the sum of its proper divisors (321567264).

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

198351828 is a wasteful number, since it uses less digits than its factorization.

198351828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1654 (or 1643 counting only the distinct ones).

The product of its digits is 138240, while the sum is 45.

The square root of 198351828 is about 14083.7433944247. The cubic root of 198351828 is about 583.1926864906.

The spelling of 198351828 in words is "one hundred ninety-eight million, three hundred fifty-one thousand, eight hundred twenty-eight".