726442717 has 32 divisors (see below), whose sum is σ = 991436544. Its totient is φ = 513907200.

The previous prime is 726442697. The next prime is 726442723. The reversal of 726442717 is 717244627.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-726442717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 726442717.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726442757) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55113 + ... + 67009.

It is an arithmetic number, because the mean of its divisors is an integer number (30982392).

Almost surely, 2^726442717 is an apocalyptic number.

726442717 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

It is an amenable number.

726442717 is a deficient number, since it is larger than the sum of its proper divisors (264993827).

726442717 is a wasteful number, since it uses less digits than its factorization.

726442717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11989.

The product of its digits is 131712, while the sum is 40.

The square root of 726442717 is about 26952.6013030282. The cubic root of 726442717 is about 898.9463872016.

The spelling of 726442717 in words is "seven hundred twenty-six million, four hundred forty-two thousand, seven hundred seventeen".