687470 has 48 divisors (see below), whose sum is σ = 1526688. Its totient is φ = 221760.

The previous prime is 687461. The next prime is 687473. The reversal of 687470 is 74786.

687470 is nontrivially palindromic in base 6.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687473) by changing a digit.

687470 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11240 + ... + 11300.

It is an arithmetic number, because the mean of its divisors is an integer number (31806).

2⁶⁸⁷⁴⁷⁰ is an apocalyptic number.

687470 is an abundant number, since it is smaller than the sum of its proper divisors (839218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

687470 is a wasteful number, since it uses less digits than its factorization.

687470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 687470 is about 829.1381067108. The cubic root of 687470 is about 88.2574246014.

The spelling of 687470 in words is "six hundred eighty-seven thousand, four hundred seventy".