680355 has 24 divisors (see below), whose sum is σ = 1271088. Its totient is φ = 334656.

The previous prime is 680353. The next prime is 680377. The reversal of 680355 is 553086.

It is not a de Polignac number, because 680355 - 2¹ = 680353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (680353) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4 + ... + 1166.

It is an arithmetic number, because the mean of its divisors is an integer number (52962).

2⁶⁸⁰³⁵⁵ is an apocalyptic number.

680355 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

680355 is a deficient number, since it is larger than the sum of its proper divisors (590733).

680355 is a wasteful number, since it uses less digits than its factorization.

680355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1187 (or 1184 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 680355 is about 824.8363474047. The cubic root of 680355 is about 87.9518934725.

It can be divided in two parts, 680 and 355, that added together give a triangular number (1035 = T₄₅).

The spelling of 680355 in words is "six hundred eighty thousand, three hundred fifty-five".