198788560 has 20 divisors (see below), whose sum is σ = 462183588. Its totient is φ = 79515392.

The previous prime is 198788543. The next prime is 198788561. The reversal of 198788560 is 65887891.

198788560 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 83612736 + 115175824 = 9144^2 + 10732^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 198788498 and 198788507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198788561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1242349 + ... + 1242508.

Almost surely, 2^198788560 is an apocalyptic number.

198788560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198788560 is an abundant number, since it is smaller than the sum of its proper divisors (263395028).

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

198788560 is a wasteful number, since it uses less digits than its factorization.

198788560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2484870 (or 2484864 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 52.

The square root of 198788560 is about 14099.2396958134. The cubic root of 198788560 is about 583.6203982101.

The spelling of 198788560 in words is "one hundred ninety-eight million, seven hundred eighty-eight thousand, five hundred sixty".