198645500 has 96 divisors (see below), whose sum is σ = 452874240. Its totient is φ = 76065600.

The previous prime is 198645481. The next prime is 198645511. The reversal of 198645500 is 5546891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1856447 + ... + 1856553.

It is an arithmetic number, because the mean of its divisors is an integer number (4717440).

Almost surely, 2^198645500 is an apocalyptic number.

198645500 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 198645500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226437120).

198645500 is an abundant number, since it is smaller than the sum of its proper divisors (254228740).

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

198645500 is a wasteful number, since it uses less digits than its factorization.

198645500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252 (or 240 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 198645500 is about 14094.1654595084. The cubic root of 198645500 is about 583.4803620314.

The spelling of 198645500 in words is "one hundred ninety-eight million, six hundred forty-five thousand, five hundred".