726891 has 8 divisors (see below), whose sum is σ = 1057344. Its totient is φ = 440520.

The previous prime is 726853. The next prime is 726893. The reversal of 726891 is 198627.

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

It is not a de Polignac number, because 726891 - 2⁹ = 726379 is a prime.

It is a super-3 number, since 3×726891³ = 1152203339784497913, which contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 22027 = 726891 / (7 + 2 + 6 + 8 + 9 + 1).

726891 is a modest number, since divided by 891 gives 726 as remainder.

It is not an unprimeable number, because it can be changed into a prime (726893) 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, 10981 + ... + 11046.

It is an arithmetic number, because the mean of its divisors is an integer number (132168).

2⁷²⁶⁸⁹¹ is an apocalyptic number.

726891 is a deficient number, since it is larger than the sum of its proper divisors (330453).

726891 is a wasteful number, since it uses less digits than its factorization.

726891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22041.

The product of its digits is 6048, while the sum is 33.

The square root of 726891 is about 852.5790285950. The cubic root of 726891 is about 89.9131260470.

The spelling of 726891 in words is "seven hundred twenty-six thousand, eight hundred ninety-one".