198647680 has 256 divisors, whose sum is σ = 616896000. Its totient is φ = 59351040.

The previous prime is 198647663. The next prime is 198647689. The reversal of 198647680 is 86746891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198647689) 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, 1429051 + ... + 1429189.

It is an arithmetic number, because the mean of its divisors is an integer number (2409750).

Almost surely, 2^198647680 is an apocalyptic number.

198647680 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 198647680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (308448000).

198647680 is an abundant number, since it is smaller than the sum of its proper divisors (418248320).

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

198647680 is a wasteful number, since it uses less digits than its factorization.

198647680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205 (or 193 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 49.

The square root of 198647680 is about 14094.2427962626. The cubic root of 198647680 is about 583.4824964577.

The spelling of 198647680 in words is "one hundred ninety-eight million, six hundred forty-seven thousand, six hundred eighty".