206767730 has 16 divisors (see below), whose sum is σ = 400811544. Its totient is φ = 76344960.

The previous prime is 206767721. The next prime is 206767751. The reversal of 206767730 is 37767602.

It can be written as a sum of positive squares in 4 ways, for example, as 190743721 + 16024009 = 13811^2 + 4003^2 .

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, 795131 + ... + 795390.

Almost surely, 2^206767730 is an apocalyptic number.

206767730 is a deficient number, since it is larger than the sum of its proper divisors (194043814).

206767730 is a wasteful number, since it uses less digits than its factorization.

206767730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1590541.

The product of its (nonzero) digits is 74088, while the sum is 38.

The square root of 206767730 is about 14379.4203638394. The cubic root of 206767730 is about 591.3268329069.

The spelling of 206767730 in words is "two hundred six million, seven hundred sixty-seven thousand, seven hundred thirty".