208725738 has 32 divisors (see below), whose sum is σ = 452348736. Its totient is φ = 63825408.

The previous prime is 208725733. The next prime is 208725757. The reversal of 208725738 is 837527802.

It is a self number, because there is not a number n which added to its sum of digits gives 208725738.

It is not an unprimeable number, because it can be changed into a prime (208725733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4506 + ... + 20922.

It is an arithmetic number, because the mean of its divisors is an integer number (14135898).

Almost surely, 2^208725738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 208725738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226174368).

208725738 is an abundant number, since it is smaller than the sum of its proper divisors (243622998).

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

208725738 is a wasteful number, since it uses less digits than its factorization.

208725738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16598.

The product of its (nonzero) digits is 188160, while the sum is 42.

The square root of 208725738 is about 14447.3436312701. The cubic root of 208725738 is about 593.1875150509.

The spelling of 208725738 in words is "two hundred eight million, seven hundred twenty-five thousand, seven hundred thirty-eight".