208020928 has 56 divisors (see below), whose sum is σ = 425470320. Its totient is φ = 100853760.

The previous prime is 208020893. The next prime is 208020929. The reversal of 208020928 is 829020802.

It is a self number, because there is not a number n which added to its sum of digits gives 208020928.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208020929) by changing a digit.

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, 740148 + ... + 740428.

Almost surely, 2^208020928 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 208020928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212735160).

208020928 is an abundant number, since it is smaller than the sum of its proper divisors (217449392).

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

208020928 is a wasteful number, since it uses less digits than its factorization.

208020928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605 (or 595 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 208020928 is about 14422.9306314632. The cubic root of 208020928 is about 592.5190845271.

The spelling of 208020928 in words is "two hundred eight million, twenty thousand, nine hundred twenty-eight".