726986 has 8 divisors (see below), whose sum is σ = 1174404. Its totient is φ = 335520.

The previous prime is 726983. The next prime is 726989. The reversal of 726986 is 689627.

It is an interprime number because it is at equal distance from previous prime (726983) and next prime (726989).

It can be written as a sum of positive squares in 2 ways, for example, as 648025 + 78961 = 805^2 + 281^2 .

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

It is not an unprimeable number, because it can be changed into a prime (726983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13955 + ... + 14006.

2⁷²⁶⁹⁸⁶ is an apocalyptic number.

726986 is a deficient number, since it is larger than the sum of its proper divisors (447418).

726986 is a wasteful number, since it uses less digits than its factorization.

726986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27976.

The product of its digits is 36288, while the sum is 38.

The square root of 726986 is about 852.6347400851. The cubic root of 726986 is about 89.9170428997.

The spelling of 726986 in words is "seven hundred twenty-six thousand, nine hundred eighty-six".