687841220 has 48 divisors (see below), whose sum is σ = 1644306048. Its totient is φ = 239247360.

The previous prime is 687841207. The next prime is 687841223. The reversal of 687841220 is 22148786.

687841220 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (687841223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62909 + ... + 73028.

It is an arithmetic number, because the mean of its divisors is an integer number (34256376).

Almost surely, 2^687841220 is an apocalyptic number.

It is an amenable number.

687841220 is an abundant number, since it is smaller than the sum of its proper divisors (956464828).

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

687841220 is a wasteful number, since it uses less digits than its factorization.

687841220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135980 (or 135978 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 687841220 is about 26226.7272071831. The cubic root of 687841220 is about 882.7330748886.

The spelling of 687841220 in words is "six hundred eighty-seven million, eight hundred forty-one thousand, two hundred twenty".