688874 has 8 divisors (see below), whose sum is σ = 1094148. Its totient is φ = 324160.

The previous prime is 688871. The next prime is 688889. The reversal of 688874 is 478886.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 664225 + 24649 = 815^2 + 157^2 .

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

It is an Ulam number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 688874.

It is not an unprimeable number, because it can be changed into a prime (688871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10097 + ... + 10164.

2⁶⁸⁸⁸⁷⁴ is an apocalyptic number.

688874 is a deficient number, since it is larger than the sum of its proper divisors (405274).

688874 is a wasteful number, since it uses less digits than its factorization.

688874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20280.

The product of its digits is 86016, while the sum is 41.

The square root of 688874 is about 829.9843372016. The cubic root of 688874 is about 88.3174656043.

The spelling of 688874 in words is "six hundred eighty-eight thousand, eight hundred seventy-four".