206449730 has 8 divisors (see below), whose sum is σ = 371609532. Its totient is φ = 82579888.

The previous prime is 206449693. The next prime is 206449741. The reversal of 206449730 is 37944602.

It can be written as a sum of positive squares in 2 ways, for example, as 191573281 + 14876449 = 13841^2 + 3857^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10322477 + ... + 10322496.

Almost surely, 2^206449730 is an apocalyptic number.

206449730 is a deficient number, since it is larger than the sum of its proper divisors (165159802).

206449730 is a wasteful number, since it uses less digits than its factorization.

206449730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20644980.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 206449730 is about 14368.3586397333. The cubic root of 206449730 is about 591.0235321686.

The spelling of 206449730 in words is "two hundred six million, four hundred forty-nine thousand, seven hundred thirty".