208291328 has 80 divisors (see below), whose sum is σ = 481710240. Its totient is φ = 88129536.

The previous prime is 208291297. The next prime is 208291333. The reversal of 208291328 is 823192802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318650 + ... + 319302.

It is an arithmetic number, because the mean of its divisors is an integer number (6021378).

Almost surely, 2^208291328 is an apocalyptic number.

208291328 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 208291328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (240855120).

208291328 is an abundant number, since it is smaller than the sum of its proper divisors (273418912).

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

208291328 is an frugal number, since it uses more digits than its factorization.

208291328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767 (or 751 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 208291328 is about 14432.3015489561. The cubic root of 208291328 is about 592.7757058066.

The spelling of 208291328 in words is "two hundred eight million, two hundred ninety-one thousand, three hundred twenty-eight".