206499680 has 144 divisors (see below), whose sum is σ = 540509760. Its totient is φ = 74280960.

The previous prime is 206499679. The next prime is 206499719. The reversal of 206499680 is 86994602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2613881 + ... + 2613959.

It is an arithmetic number, because the mean of its divisors is an integer number (3753540).

Almost surely, 2^206499680 is an apocalyptic number.

206499680 is a gapful number since it is divisible by the number (20) 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 206499680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270254880).

206499680 is an abundant number, since it is smaller than the sum of its proper divisors (334010080).

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

206499680 is a wasteful number, since it uses less digits than its factorization.

206499680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 206499680 is about 14370.0967289716. The cubic root of 206499680 is about 591.0711938841.

The spelling of 206499680 in words is "two hundred six million, four hundred ninety-nine thousand, six hundred eighty".