208921206 has 32 divisors (see below), whose sum is σ = 451045728. Its totient is φ = 64131840.

The previous prime is 208921187. The next prime is 208921243. The reversal of 208921206 is 602129802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32716 + ... + 38576.

It is an arithmetic number, because the mean of its divisors is an integer number (14095179).

Almost surely, 2^208921206 is an apocalyptic number.

208921206 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

208921206 is an abundant number, since it is smaller than the sum of its proper divisors (242124522).

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

208921206 is a wasteful number, since it uses less digits than its factorization.

208921206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6336.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 208921206 is about 14454.1068904308. The cubic root of 208921206 is about 593.3726271863.

The spelling of 208921206 in words is "two hundred eight million, nine hundred twenty-one thousand, two hundred six".