206400556 has 12 divisors (see below), whose sum is σ = 361302480. Its totient is φ = 103171280.

The previous prime is 206400533. The next prime is 206400583. The reversal of 206400556 is 655004602.

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 3 ways as a sum of consecutive naturals, for example, 20961 + ... + 29191.

It is an arithmetic number, because the mean of its divisors is an integer number (30108540).

Almost surely, 2^206400556 is an apocalyptic number.

It is an amenable number.

206400556 is a deficient number, since it is larger than the sum of its proper divisors (154901924).

206400556 is a wasteful number, since it uses less digits than its factorization.

206400556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14504 (or 14502 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 206400556 is about 14366.6473472415. The cubic root of 206400556 is about 590.9766033933.

The spelling of 206400556 in words is "two hundred six million, four hundred thousand, five hundred fifty-six".