685380 has 24 divisors (see below), whose sum is σ = 1919232. Its totient is φ = 182752.

The previous prime is 685369. The next prime is 685381. The reversal of 685380 is 83586.

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

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (685381) by changing a digit.

685380 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, 5652 + ... + 5771.

It is an arithmetic number, because the mean of its divisors is an integer number (79968).

2⁶⁸⁵³⁸⁰ is an apocalyptic number.

685380 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

685380 is an abundant number, since it is smaller than the sum of its proper divisors (1233852).

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

685380 is a wasteful number, since it uses less digits than its factorization.

685380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11435 (or 11433 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 685380 is about 827.8768024290. The cubic root of 685380 is about 88.1678957205.

The spelling of 685380 in words is "six hundred eighty-five thousand, three hundred eighty".