726520 has 32 divisors (see below), whose sum is σ = 1678320. Its totient is φ = 282880.

The previous prime is 726497. The next prime is 726521. The reversal of 726520 is 25627.

It is a junction number, because it is equal to n+sod(n) for n = 726491 and 726500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1419 + ... + 1861.

2⁷²⁶⁵²⁰ 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 726520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (839160).

726520 is an abundant number, since it is smaller than the sum of its proper divisors (951800).

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

726520 is a wasteful number, since it uses less digits than its factorization.

726520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495 (or 491 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 726520 is about 852.3614256875. The cubic root of 726520 is about 89.8978264370.

The spelling of 726520 in words is "seven hundred twenty-six thousand, five hundred twenty".