726836261 has 16 divisors (see below), whose sum is σ = 762624000. Its totient is φ = 691891200.

The previous prime is 726836237. The next prime is 726836273. The reversal of 726836261 is 162638627.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-726836261 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726836291) 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, 1099271 + ... + 1099931.

It is an arithmetic number, because the mean of its divisors is an integer number (47664000).

Almost surely, 2^726836261 is an apocalyptic number.

It is an amenable number.

726836261 is a deficient number, since it is larger than the sum of its proper divisors (35787739).

726836261 is a wasteful number, since it uses less digits than its factorization.

726836261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1220.

The product of its digits is 145152, while the sum is 41.

The square root of 726836261 is about 26959.9009827559. The cubic root of 726836261 is about 899.1086900155.

The spelling of 726836261 in words is "seven hundred twenty-six million, eight hundred thirty-six thousand, two hundred sixty-one".