726785 has 8 divisors (see below), whose sum is σ = 879336. Its totient is φ = 576640.

The previous prime is 726779. The next prime is 726787. The reversal of 726785 is 587627.

It can be written as a sum of positive squares in 4 ways, for example, as 135424 + 591361 = 368^2 + 769^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-726785 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (726787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155 + ... + 1215.

It is an arithmetic number, because the mean of its divisors is an integer number (109917).

2⁷²⁶⁷⁸⁵ is an apocalyptic number.

It is an amenable number.

726785 is a deficient number, since it is larger than the sum of its proper divisors (152551).

726785 is a wasteful number, since it uses less digits than its factorization.

726785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1203.

The product of its digits is 23520, while the sum is 35.

The square root of 726785 is about 852.5168620033. The cubic root of 726785 is about 89.9087552612.

The spelling of 726785 in words is "seven hundred twenty-six thousand, seven hundred eighty-five".