688534 has 32 divisors (see below), whose sum is σ = 1368576. Its totient is φ = 251520.

The previous prime is 688531. The next prime is 688543. The reversal of 688534 is 435886.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a self number, because there is not a number n which added to its sum of digits gives 688534.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2487 + ... + 2749.

It is an arithmetic number, because the mean of its divisors is an integer number (42768).

2⁶⁸⁸⁵³⁴ is an apocalyptic number.

688534 is a deficient number, since it is larger than the sum of its proper divisors (680042).

688534 is a wasteful number, since it uses less digits than its factorization.

688534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300.

The product of its digits is 23040, while the sum is 34.

The square root of 688534 is about 829.7794887800. The cubic root of 688534 is about 88.3029332516.

The spelling of 688534 in words is "six hundred eighty-eight thousand, five hundred thirty-four".