199218680 has 32 divisors (see below), whose sum is σ = 455595840. Its totient is φ = 78380160.

The previous prime is 199218673. The next prime is 199218703. The reversal of 199218680 is 86812991.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38384 + ... + 43263.

It is an arithmetic number, because the mean of its divisors is an integer number (14237370).

Almost surely, 2^199218680 is an apocalyptic number.

199218680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199218680 is an abundant number, since it is smaller than the sum of its proper divisors (256377160).

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

199218680 is a wasteful number, since it uses less digits than its factorization.

199218680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81719 (or 81715 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 44.

The square root of 199218680 is about 14114.4847585734. The cubic root of 199218680 is about 584.0410226391.

The spelling of 199218680 in words is "one hundred ninety-nine million, two hundred eighteen thousand, six hundred eighty".