199998680 has 64 divisors (see below), whose sum is σ = 524024640. Its totient is φ = 67272192.

The previous prime is 199998661. The next prime is 199998707. The reversal of 199998680 is 86899991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8102 + ... + 21578.

It is an arithmetic number, because the mean of its divisors is an integer number (8187885).

Almost surely, 2^199998680 is an apocalyptic number.

199998680 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 199998680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262012320).

199998680 is an abundant number, since it is smaller than the sum of its proper divisors (324025960).

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

199998680 is a wasteful number, since it uses less digits than its factorization.

199998680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13548 (or 13544 counting only the distinct ones).

The product of its (nonzero) digits is 2519424, while the sum is 59.

The square root of 199998680 is about 14142.0889546064. The cubic root of 199998680 is about 584.8022610719.

The spelling of 199998680 in words is "one hundred ninety-nine million, nine hundred ninety-eight thousand, six hundred eighty".