206417090 has 16 divisors (see below), whose sum is σ = 405328320. Its totient is φ = 75060720.

The previous prime is 206417089. The next prime is 206417131. The reversal of 206417090 is 90714602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 938150 + ... + 938369.

It is an arithmetic number, because the mean of its divisors is an integer number (25333020).

Almost surely, 2^206417090 is an apocalyptic number.

206417090 is a deficient number, since it is larger than the sum of its proper divisors (198911230).

206417090 is a wasteful number, since it uses less digits than its factorization.

206417090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1876537.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 206417090 is about 14367.2227657262. Note that the first 3 decimals coincide. The cubic root of 206417090 is about 590.9923833028.

The spelling of 206417090 in words is "two hundred six million, four hundred seventeen thousand, ninety".