198040000 has 70 divisors (see below), whose sum is σ = 491174024. Its totient is φ = 79200000.

The previous prime is 198039979. The next prime is 198040001. The reversal of 198040000 is 40891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198040001) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 37525 + ... + 42475.

Almost surely, 2^198040000 is an apocalyptic number.

198040000 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 198040000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245587012).

198040000 is an abundant number, since it is smaller than the sum of its proper divisors (293134024).

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

198040000 is an frugal number, since it uses more digits than its factorization.

198040000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4983 (or 4958 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 198040000 is about 14072.6685458018. The cubic root of 198040000 is about 582.8869146836.

Adding to 198040000 its reverse (40891), we get a palindrome (198080891).

The spelling of 198040000 in words is "one hundred ninety-eight million, forty thousand".