198847620 has 144 divisors (see below), whose sum is σ = 629494320. Its totient is φ = 50761728.

The previous prime is 198847619. The next prime is 198847637. The reversal of 198847620 is 26748891.

198847620 is a `hidden beast` number, since 19 + 8 + 8 + 4 + 7 + 620 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 35212356 + 163635264 = 5934^2 + 12792^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 485976 + ... + 486384.

Almost surely, 2^198847620 is an apocalyptic number.

198847620 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 198847620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (314747160).

198847620 is an abundant number, since it is smaller than the sum of its proper divisors (430646700).

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

198847620 is a wasteful number, since it uses less digits than its factorization.

198847620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534 (or 529 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 198847620 is about 14101.3339794503. Note that the first 3 decimals coincide. The cubic root of 198847620 is about 583.6781902812.

The spelling of 198847620 in words is "one hundred ninety-eight million, eight hundred forty-seven thousand, six hundred twenty".