208285988 has 12 divisors (see below), whose sum is σ = 368596620. Its totient is φ = 102972672.

The previous prime is 208285981. The next prime is 208285997. The reversal of 208285988 is 889582802.

It can be written as a sum of positive squares in 2 ways, for example, as 39337984 + 168948004 = 6272^2 + 12998^2 .

It is a super-2 number, since 2×208285988² = 86766105594272288, which contains 22 as substring.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (208285981) 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 3 ways as a sum of consecutive naturals, for example, 292181 + ... + 292892.

It is an arithmetic number, because the mean of its divisors is an integer number (30716385).

Almost surely, 2^208285988 is an apocalyptic number.

It is an amenable number.

208285988 is a deficient number, since it is larger than the sum of its proper divisors (160310632).

208285988 is a wasteful number, since it uses less digits than its factorization.

208285988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585166 (or 585164 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 50.

The square root of 208285988 is about 14432.1165460926. The cubic root of 208285988 is about 592.7706400663.

The spelling of 208285988 in words is "two hundred eight million, two hundred eighty-five thousand, nine hundred eighty-eight".