208381028 has 6 divisors (see below), whose sum is σ = 364666806. Its totient is φ = 104190512.

The previous prime is 208381027. The next prime is 208381031. The reversal of 208381028 is 820183802.

It can be written as a sum of positive squares in only one way, i.e., 118548544 + 89832484 = 10888^2 + 9478^2 .

It is a junction number, because it is equal to n+sod(n) for n = 208380985 and 208381003.

It is not an unprimeable number, because it can be changed into a prime (208381027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26047625 + ... + 26047632.

It is an arithmetic number, because the mean of its divisors is an integer number (60777801).

Almost surely, 2^208381028 is an apocalyptic number.

It is an amenable number.

208381028 is a deficient number, since it is larger than the sum of its proper divisors (156285778).

208381028 is a wasteful number, since it uses less digits than its factorization.

208381028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52095261 (or 52095259 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 208381028 is about 14435.4088269089. The cubic root of 208381028 is about 592.8607859207.

The spelling of 208381028 in words is "two hundred eight million, three hundred eighty-one thousand, twenty-eight".