687358 has 16 divisors (see below), whose sum is σ = 1219680. Its totient is φ = 284256.

The previous prime is 687343. The next prime is 687359. The reversal of 687358 is 853786.

It is a super-2 number, since 2×687358² = 944922040328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687359) by changing a digit.

687358 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 441 + ... + 1252.

It is an arithmetic number, because the mean of its divisors is an integer number (76230).

2⁶⁸⁷³⁵⁸ is an apocalyptic number.

687358 is a deficient number, since it is larger than the sum of its proper divisors (532322).

687358 is a wasteful number, since it uses less digits than its factorization.

687358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1731.

The product of its digits is 40320, while the sum is 37.

The square root of 687358 is about 829.0705639450. The cubic root of 687358 is about 88.2526314864.

The spelling of 687358 in words is "six hundred eighty-seven thousand, three hundred fifty-eight".