687276 has 36 divisors (see below), whose sum is σ = 1841112. Its totient is φ = 215424.

The previous prime is 687233. The next prime is 687277. The reversal of 687276 is 672786.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 687276.

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

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 11 ways as a sum of consecutive naturals, for example, 51 + ... + 1173.

It is an arithmetic number, because the mean of its divisors is an integer number (51142).

2⁶⁸⁷²⁷⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 687276, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (920556).

687276 is an abundant number, since it is smaller than the sum of its proper divisors (1153836).

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

687276 is a wasteful number, since it uses less digits than its factorization.

687276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1150 (or 1145 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 687276 is about 829.0211095020. The cubic root of 687276 is about 88.2491219113.

687276 divided by its sum of digits (36) gives a palindrome (19091).

The spelling of 687276 in words is "six hundred eighty-seven thousand, two hundred seventy-six".