206690280 has 32 divisors (see below), whose sum is σ = 620071200. Its totient is φ = 55117376.

The previous prime is 206690261. The next prime is 206690311. The reversal of 206690280 is 82096602.

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, 861090 + ... + 861329.

It is an arithmetic number, because the mean of its divisors is an integer number (19377225).

Almost surely, 2^206690280 is an apocalyptic number.

206690280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206690280 is an abundant number, since it is smaller than the sum of its proper divisors (413380920).

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

206690280 is a wasteful number, since it uses less digits than its factorization.

206690280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1722433 (or 1722429 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 206690280 is about 14376.7270266914. The cubic root of 206690280 is about 591.2529916250.

The spelling of 206690280 in words is "two hundred six million, six hundred ninety thousand, two hundred eighty".