199786680 has 192 divisors, whose sum is σ = 681838560. Its totient is φ = 50678784.

The previous prime is 199786679. The next prime is 199786693. The reversal of 199786680 is 86687991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 705819 + ... + 706101.

Almost surely, 2^199786680 is an apocalyptic number.

199786680 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 199786680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (340919280).

199786680 is an abundant number, since it is smaller than the sum of its proper divisors (482051880).

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

199786680 is a wasteful number, since it uses less digits than its factorization.

199786680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390 (or 383 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The square root of 199786680 is about 14134.5916106550. The cubic root of 199786680 is about 584.5955565226.

The spelling of 199786680 in words is "one hundred ninety-nine million, seven hundred eighty-six thousand, six hundred eighty".