688280 has 16 divisors (see below), whose sum is σ = 1548720. Its totient is φ = 275296.

The previous prime is 688277. The next prime is 688297. The reversal of 688280 is 82886.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8564 + ... + 8643.

It is an arithmetic number, because the mean of its divisors is an integer number (96795).

2⁶⁸⁸²⁸⁰ is an apocalyptic number.

It is an amenable number.

688280 is an abundant number, since it is smaller than the sum of its proper divisors (860440).

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

688280 is a wasteful number, since it uses less digits than its factorization.

688280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17218 (or 17214 counting only the distinct ones).

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

The square root of 688280 is about 829.6264219515. The cubic root of 688280 is about 88.2920736070.

The spelling of 688280 in words is "six hundred eighty-eight thousand, two hundred eighty".