206473806 has 256 divisors, whose sum is σ = 637009920. Its totient is φ = 47900160.

The previous prime is 206473781. The next prime is 206473811. The reversal of 206473806 is 608374602.

206473806 is a `hidden beast` number, since 2 + 0 + 647 + 3 + 8 + 0 + 6 = 666.

It is a congruent number.

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 127 ways as a sum of consecutive naturals, for example, 1625715 + ... + 1625841.

It is an arithmetic number, because the mean of its divisors is an integer number (2488320).

Almost surely, 2^206473806 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206473806, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318504960).

206473806 is an abundant number, since it is smaller than the sum of its proper divisors (430536114).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206473806 is a wasteful number, since it uses less digits than its factorization.

206473806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 206473806 is about 14369.1964284716. The cubic root of 206473806 is about 591.0465061705.

The spelling of 206473806 in words is "two hundred six million, four hundred seventy-three thousand, eight hundred six".