726680 has 32 divisors (see below), whose sum is σ = 1682640. Its totient is φ = 282240.

The previous prime is 726679. The next prime is 726689. The reversal of 726680 is 86627.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1235 + ... + 1725.

2⁷²⁶⁶⁸⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 726680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (841320).

726680 is an abundant number, since it is smaller than the sum of its proper divisors (955960).

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

726680 is a wasteful number, since it uses less digits than its factorization.

726680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539 (or 535 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 726680 is about 852.4552774193. The cubic root of 726680 is about 89.9044252902.

The spelling of 726680 in words is "seven hundred twenty-six thousand, six hundred eighty".