206090856 has 96 divisors (see below), whose sum is σ = 588893760. Its totient is φ = 64982016.

The previous prime is 206090831. The next prime is 206090897. The reversal of 206090856 is 658090602.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 206090856.

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 23 ways as a sum of consecutive naturals, for example, 159991 + ... + 161273.

It is an arithmetic number, because the mean of its divisors is an integer number (6134310).

Almost surely, 2^206090856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206090856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294446880).

206090856 is an abundant number, since it is smaller than the sum of its proper divisors (382802904).

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

206090856 is a wasteful number, since it uses less digits than its factorization.

206090856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1415 (or 1408 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 206090856 is about 14355.8648642288. The cubic root of 206090856 is about 590.6808724837.

The spelling of 206090856 in words is "two hundred six million, ninety thousand, eight hundred fifty-six".