688342 has 4 divisors (see below), whose sum is σ = 1032516. Its totient is φ = 344170.

The previous prime is 688339. The next prime is 688357. The reversal of 688342 is 243886.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172084 + ... + 172087.

It is an arithmetic number, because the mean of its divisors is an integer number (258129).

2⁶⁸⁸³⁴² is an apocalyptic number.

688342 is a deficient number, since it is larger than the sum of its proper divisors (344174).

688342 is a wasteful number, since it uses less digits than its factorization.

688342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344173.

The product of its digits is 9216, while the sum is 31.

The square root of 688342 is about 829.6637873259. The cubic root of 688342 is about 88.2947246329.

The spelling of 688342 in words is "six hundred eighty-eight thousand, three hundred forty-two".