687338 has 8 divisors (see below), whose sum is σ = 1034532. Its totient is φ = 342496.

The previous prime is 687331. The next prime is 687341. The reversal of 687338 is 833786.

It can be written as a sum of positive squares in 2 ways, for example, as 499849 + 187489 = 707^2 + 433^2 .

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 687298 and 687307.

It is not an unprimeable number, because it can be changed into a prime (687331) 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, 806 + ... + 1422.

2⁶⁸⁷³³⁸ is an apocalyptic number.

687338 is a deficient number, since it is larger than the sum of its proper divisors (347194).

687338 is a wasteful number, since it uses less digits than its factorization.

687338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176.

The product of its digits is 24192, while the sum is 35.

The square root of 687338 is about 829.0585021577. The cubic root of 687338 is about 88.2517755182.

The spelling of 687338 in words is "six hundred eighty-seven thousand, three hundred thirty-eight".