206809080 has 64 divisors (see below), whose sum is σ = 656929440. Its totient is φ = 51904512.

The previous prime is 206809067. The next prime is 206809081. The reversal of 206809080 is 80908602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206809081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48649 + ... + 52728.

Almost surely, 2^206809080 is an apocalyptic number.

206809080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206809080 is an abundant number, since it is smaller than the sum of its proper divisors (450120360).

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

206809080 is a wasteful number, since it uses less digits than its factorization.

206809080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101408 (or 101404 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 206809080 is about 14380.8581106970. The cubic root of 206809080 is about 591.3662486880.

The spelling of 206809080 in words is "two hundred six million, eight hundred nine thousand, eighty".