680578 has 16 divisors (see below), whose sum is σ = 1112184. Its totient is φ = 311040.

The previous prime is 680569. The next prime is 680587. The reversal of 680578 is 875086.

It is an interprime number because it is at equal distance from previous prime (680569) and next prime (680587).

It can be written as a sum of positive squares in 4 ways, for example, as 677329 + 3249 = 823^2 + 57^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 988 + ... + 1528.

2⁶⁸⁰⁵⁷⁸ is an apocalyptic number.

680578 is a deficient number, since it is larger than the sum of its proper divisors (431606).

680578 is a wasteful number, since it uses less digits than its factorization.

680578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 680578 is about 824.9715146597. The cubic root of 680578 is about 87.9615017553.

The spelling of 680578 in words is "six hundred eighty thousand, five hundred seventy-eight".