688355 has 8 divisors (see below), whose sum is σ = 852864. Its totient is φ = 532800.

The previous prime is 688339. The next prime is 688357. The reversal of 688355 is 553886.

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

It is not a de Polignac number, because 688355 - 2⁴ = 688339 is a prime.

It is a d-powerful number, because it can be written as 6 + 8⁵ + 3⁷ + 8⁶ + 5⁴ + 5⁸ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (688357) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2066 + ... + 2375.

It is an arithmetic number, because the mean of its divisors is an integer number (106608).

2⁶⁸⁸³⁵⁵ is an apocalyptic number.

688355 is a deficient number, since it is larger than the sum of its proper divisors (164509).

688355 is a wasteful number, since it uses less digits than its factorization.

688355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4477.

The product of its digits is 28800, while the sum is 35.

The square root of 688355 is about 829.6716217878. The cubic root of 688355 is about 88.2952804729.

The spelling of 688355 in words is "six hundred eighty-eight thousand, three hundred fifty-five".