726540 has 24 divisors (see below), whose sum is σ = 2034480. Its totient is φ = 193728.

The previous prime is 726533. The next prime is 726559. The reversal of 726540 is 45627.

It is a happy number.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 726540.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 726540.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5995 + ... + 6114.

It is an arithmetic number, because the mean of its divisors is an integer number (84770).

2⁷²⁶⁵⁴⁰ is an apocalyptic number.

It is an amenable number.

726540 is an abundant number, since it is smaller than the sum of its proper divisors (1307940).

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

726540 is a wasteful number, since it uses less digits than its factorization.

726540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12121 (or 12119 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 726540 is about 852.3731577191. The cubic root of 726540 is about 89.8986513466.

The spelling of 726540 in words is "seven hundred twenty-six thousand, five hundred forty".