206409156 has 48 divisors (see below), whose sum is σ = 490533120. Its totient is φ = 67541760.

The previous prime is 206409149. The next prime is 206409157. The reversal of 206409156 is 651904602.

It is not an unprimeable number, because it can be changed into a prime (206409157) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 167061 + ... + 168291.

It is an arithmetic number, because the mean of its divisors is an integer number (10219440).

Almost surely, 2^206409156 is an apocalyptic number.

It is an amenable number.

206409156 is an abundant number, since it is smaller than the sum of its proper divisors (284123964).

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

206409156 is a wasteful number, since it uses less digits than its factorization.

206409156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1484 (or 1482 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 206409156 is about 14366.9466484706. The cubic root of 206409156 is about 590.9848112656.

The spelling of 206409156 in words is "two hundred six million, four hundred nine thousand, one hundred fifty-six".