687270 has 32 divisors (see below), whose sum is σ = 1704960. Its totient is φ = 177120.

The previous prime is 687233. The next prime is 687277. The reversal of 687270 is 72786.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 687270.

It is not an unprimeable number, because it can be changed into a prime (687277) by changing a digit.

687270 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 (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 561 + ... + 1299.

It is an arithmetic number, because the mean of its divisors is an integer number (53280).

2⁶⁸⁷²⁷⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 687270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (852480).

687270 is an abundant number, since it is smaller than the sum of its proper divisors (1017690).

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

687270 is a wasteful number, since it uses less digits than its factorization.

687270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 687270 is about 829.0174907684. The cubic root of 687270 is about 88.2488651022.

The spelling of 687270 in words is "six hundred eighty-seven thousand, two hundred seventy".