206390355 has 8 divisors (see below), whose sum is σ = 330224592. Its totient is φ = 110074848.

The previous prime is 206390347. The next prime is 206390383. The reversal of 206390355 is 553093602.

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

It is not a de Polignac number, because 206390355 - 2³ = 206390347 is a prime.

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, 6879664 + ... + 6879693.

It is an arithmetic number, because the mean of its divisors is an integer number (41278074).

Almost surely, 2^206390355 is an apocalyptic number.

206390355 is a deficient number, since it is larger than the sum of its proper divisors (123834237).

206390355 is a wasteful number, since it uses less digits than its factorization.

206390355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13759365.

The product of its (nonzero) digits is 24300, while the sum is 33.

The square root of 206390355 is about 14366.2923191755. The cubic root of 206390355 is about 590.9668672250.

The spelling of 206390355 in words is "two hundred six million, three hundred ninety thousand, three hundred fifty-five".