688877220 has 48 divisors (see below), whose sum is σ = 1929997440. Its totient is φ = 183591936.

The previous prime is 688877173. The next prime is 688877263. The reversal of 688877220 is 22778886.

688877220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 688877220.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188329 + ... + 191951.

It is an arithmetic number, because the mean of its divisors is an integer number (40208280).

Almost surely, 2^688877220 is an apocalyptic number.

688877220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

688877220 is an abundant number, since it is smaller than the sum of its proper divisors (1241120220).

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

688877220 is a wasteful number, since it uses less digits than its factorization.

688877220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6804 (or 6802 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 48.

The square root of 688877220 is about 26246.4706198757. The cubic root of 688877220 is about 883.1760321142.

The spelling of 688877220 in words is "six hundred eighty-eight million, eight hundred seventy-seven thousand, two hundred twenty".