208728704 has 64 divisors (see below), whose sum is σ = 440052480. Its totient is φ = 98457600.

The previous prime is 208728697. The next prime is 208728713. The reversal of 208728704 is 407827802.

It is a tau number, because it is divible by the number of its divisors (64).

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 7 ways as a sum of consecutive naturals, for example, 162047 + ... + 163329.

It is an arithmetic number, because the mean of its divisors is an integer number (6875820).

Almost surely, 2^208728704 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 208728704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220026240).

208728704 is an abundant number, since it is smaller than the sum of its proper divisors (231323776).

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

208728704 is a wasteful number, since it uses less digits than its factorization.

208728704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369 (or 1357 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 38.

The square root of 208728704 is about 14447.4462795333. The cubic root of 208728704 is about 593.1903247760.

The spelling of 208728704 in words is "two hundred eight million, seven hundred twenty-eight thousand, seven hundred four".