198940104 has 128 divisors (see below), whose sum is σ = 609552000. Its totient is φ = 59616000.

The previous prime is 198940099. The next prime is 198940109. The reversal of 198940104 is 401049891.

It is an interprime number because it is at equal distance from previous prime (198940099) and next prime (198940109).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (198940109) 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, 239562 + ... + 240390.

It is an arithmetic number, because the mean of its divisors is an integer number (4762125).

Almost surely, 2^198940104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198940104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (304776000).

198940104 is an abundant number, since it is smaller than the sum of its proper divisors (410611896).

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

198940104 is a wasteful number, since it uses less digits than its factorization.

198940104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956 (or 946 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 198940104 is about 14104.6128624645. The cubic root of 198940104 is about 583.7686658039.

Adding to 198940104 its reverse (401049891), we get a palindrome (599989995).

The spelling of 198940104 in words is "one hundred ninety-eight million, nine hundred forty thousand, one hundred four".