729826 has 8 divisors (see below), whose sum is σ = 1105884. Its totient is φ = 361200.

The previous prime is 729821. The next prime is 729851. The reversal of 729826 is 628927.

It can be written as a sum of positive squares in 2 ways, for example, as 724201 + 5625 = 851^2 + 75^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 729791 and 729800.

It is not an unprimeable number, because it can be changed into a prime (729821) by changing a digit.

729826 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1605 + ... + 2008.

2⁷²⁹⁸²⁶ is an apocalyptic number.

729826 is a deficient number, since it is larger than the sum of its proper divisors (376058).

729826 is a wasteful number, since it uses less digits than its factorization.

729826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3716.

The product of its digits is 12096, while the sum is 34.

The square root of 729826 is about 854.2985426653. The cubic root of 729826 is about 90.0339789394.

The spelling of 729826 in words is "seven hundred twenty-nine thousand, eight hundred twenty-six".