726240 has 96 divisors (see below), whose sum is σ = 2449440. Its totient is φ = 180224.

The previous prime is 726221. The next prime is 726287. The reversal of 726240 is 42627.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8116 + ... + 8204.

It is an arithmetic number, because the mean of its divisors is an integer number (25515).

2⁷²⁶²⁴⁰ 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 726240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1224720).

726240 is an abundant number, since it is smaller than the sum of its proper divisors (1723200).

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

726240 is a wasteful number, since it uses less digits than its factorization.

726240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 726240 is about 852.1971602863. The cubic root of 726240 is about 89.8862761123.

Adding to 726240 its reverse (42627), we get a palindrome (768867).

The spelling of 726240 in words is "seven hundred twenty-six thousand, two hundred forty".