198640350 has 72 divisors (see below), whose sum is σ = 553480200. Its totient is φ = 52967520.

The previous prime is 198640303. The next prime is 198640357. The reversal of 198640350 is 53046891.

198640350 is a `hidden beast` number, since 1 + 9 + 8 + 640 + 3 + 5 + 0 = 666.

198640350 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198640357) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3976 + ... + 20324.

It is an arithmetic number, because the mean of its divisors is an integer number (7687225).

Almost surely, 2^198640350 is an apocalyptic number.

198640350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 198640350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276740100).

198640350 is an abundant number, since it is smaller than the sum of its proper divisors (354839850).

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

198640350 is a wasteful number, since it uses less digits than its factorization.

198640350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16376 (or 16359 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 198640350 is about 14093.9827586101. The cubic root of 198640350 is about 583.4753196320.

The spelling of 198640350 in words is "one hundred ninety-eight million, six hundred forty thousand, three hundred fifty".