726311644 has 12 divisors (see below), whose sum is σ = 1271592000. Its totient is φ = 362999648.

The previous prime is 726311569. The next prime is 726311693. The reversal of 726311644 is 446113627.

726311644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×726311644³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28249 + ... + 47440.

It is an arithmetic number, because the mean of its divisors is an integer number (105966000).

Almost surely, 2^726311644 is an apocalyptic number.

It is an amenable number.

726311644 is a deficient number, since it is larger than the sum of its proper divisors (545280356).

726311644 is a wasteful number, since it uses less digits than its factorization.

726311644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78092 (or 78090 counting only the distinct ones).

The product of its digits is 24192, while the sum is 34.

The square root of 726311644 is about 26950.1696469614. The cubic root of 726311644 is about 898.8923179293.

The spelling of 726311644 in words is "seven hundred twenty-six million, three hundred eleven thousand, six hundred forty-four".