206326778 has 16 divisors (see below), whose sum is σ = 353994624. Its totient is φ = 88352880.

The previous prime is 206326777. The next prime is 206326789. The reversal of 206326778 is 877623602.

It is a super-2 number, since 2×206326778² = 85141478639722568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (206326777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13748 + ... + 24528.

It is an arithmetic number, because the mean of its divisors is an integer number (22124664).

Almost surely, 2^206326778 is an apocalyptic number.

206326778 is a deficient number, since it is larger than the sum of its proper divisors (147667846).

206326778 is a wasteful number, since it uses less digits than its factorization.

206326778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12157.

The product of its (nonzero) digits is 169344, while the sum is 41.

The square root of 206326778 is about 14364.0794344782. The cubic root of 206326778 is about 590.9061800237.

The spelling of 206326778 in words is "two hundred six million, three hundred twenty-six thousand, seven hundred seventy-eight".