688285 has 8 divisors (see below), whose sum is σ = 889560. Its totient is φ = 508224.

The previous prime is 688277. The next prime is 688297. The reversal of 688285 is 582886.

It can be written as a sum of positive squares in 4 ways, for example, as 4356 + 683929 = 66^2 + 827^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 688285 - 2³ = 688277 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5230 + ... + 5359.

It is an arithmetic number, because the mean of its divisors is an integer number (111195).

2⁶⁸⁸²⁸⁵ is an apocalyptic number.

688285 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

688285 is a deficient number, since it is larger than the sum of its proper divisors (201275).

688285 is a wasteful number, since it uses less digits than its factorization.

688285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10607.

The product of its digits is 30720, while the sum is 37.

The square root of 688285 is about 829.6294353505. The cubic root of 688285 is about 88.2922874053.

The spelling of 688285 in words is "six hundred eighty-eight thousand, two hundred eighty-five".