726296321 has 16 divisors (see below), whose sum is σ = 782012880. Its totient is φ = 672122880.

The previous prime is 726296297. The next prime is 726296339. The reversal of 726296321 is 123692627.

It can be written as a sum of positive squares in 8 ways, for example, as 72931600 + 653364721 = 8540^2 + 25561^2 .

It is not a de Polignac number, because 726296321 - 2⁶ = 726296257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (726296381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252431 + ... + 255291.

It is an arithmetic number, because the mean of its divisors is an integer number (48875805).

Almost surely, 2^726296321 is an apocalyptic number.

It is an amenable number.

726296321 is a deficient number, since it is larger than the sum of its proper divisors (55716559).

726296321 is a wasteful number, since it uses less digits than its factorization.

726296321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3124.

The product of its digits is 54432, while the sum is 38.

The square root of 726296321 is about 26949.8853615373. The cubic root of 726296321 is about 898.8859965731.

The spelling of 726296321 in words is "seven hundred twenty-six million, two hundred ninety-six thousand, three hundred twenty-one".