680526 has 48 divisors (see below), whose sum is σ = 1842048. Its totient is φ = 176400.

The previous prime is 680509. The next prime is 680531. The reversal of 680526 is 625086.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 680526.

It is a congruent number.

It is an unprimeable number.

680526 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 23 ways as a sum of consecutive naturals, for example, 1141 + ... + 1631.

It is an arithmetic number, because the mean of its divisors is an integer number (38376).

2⁶⁸⁰⁵²⁶ is an apocalyptic number.

680526 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 680526, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (921024).

680526 is an abundant number, since it is smaller than the sum of its proper divisors (1161522).

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

680526 is a wasteful number, since it uses less digits than its factorization.

680526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517 (or 514 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 680526 is about 824.9399978180. The cubic root of 680526 is about 87.9592614465.

The spelling of 680526 in words is "six hundred eighty thousand, five hundred twenty-six".