198411678 has 48 divisors (see below), whose sum is σ = 447876000. Its totient is φ = 63403200.

The previous prime is 198411673. The next prime is 198411679. The reversal of 198411678 is 876114891.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198411673) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76503 + ... + 79053.

It is an arithmetic number, because the mean of its divisors is an integer number (9330750).

Almost surely, 2^198411678 is an apocalyptic number.

198411678 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 198411678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223938000).

198411678 is an abundant number, since it is smaller than the sum of its proper divisors (249464322).

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

198411678 is a wasteful number, since it uses less digits than its factorization.

198411678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2737 (or 2734 counting only the distinct ones).

The product of its digits is 96768, while the sum is 45.

The square root of 198411678 is about 14085.8680243711. The cubic root of 198411678 is about 583.2513374454.

The spelling of 198411678 in words is "one hundred ninety-eight million, four hundred eleven thousand, six hundred seventy-eight".