208687980 has 48 divisors (see below), whose sum is σ = 591736320. Its totient is φ = 54944448.

The previous prime is 208687949. The next prime is 208687981. The reversal of 208687980 is 89786802.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (208687981) 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 in 15 ways as a sum of consecutive naturals, for example, 17274 + ... + 26753.

It is an arithmetic number, because the mean of its divisors is an integer number (12327840).

Almost surely, 2^208687980 is an apocalyptic number.

208687980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

208687980 is an abundant number, since it is smaller than the sum of its proper divisors (383048340).

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

208687980 is a wasteful number, since it uses less digits than its factorization.

208687980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44118 (or 44116 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 48.

The square root of 208687980 is about 14446.0368267563. The cubic root of 208687980 is about 593.1517441471.

The spelling of 208687980 in words is "two hundred eight million, six hundred eighty-seven thousand, nine hundred eighty".