687380 has 12 divisors (see below), whose sum is σ = 1443540. Its totient is φ = 274944.

The previous prime is 687359. The next prime is 687383. The reversal of 687380 is 83786.

687380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 512656 + 174724 = 716^2 + 418^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687383) 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, 17165 + ... + 17204.

It is an arithmetic number, because the mean of its divisors is an integer number (120295).

2⁶⁸⁷³⁸⁰ is an apocalyptic number.

It is an amenable number.

687380 is an abundant number, since it is smaller than the sum of its proper divisors (756160).

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

687380 is a wasteful number, since it uses less digits than its factorization.

687380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34378 (or 34376 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 687380 is about 829.0838317082. The cubic root of 687380 is about 88.2535730322.

The spelling of 687380 in words is "six hundred eighty-seven thousand, three hundred eighty".