726590 has 16 divisors (see below), whose sum is σ = 1321488. Its totient is φ = 287616.

The previous prime is 726589. The next prime is 726599. The reversal of 726590 is 95627.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 726590.

It is not an unprimeable number, because it can be changed into a prime (726599) 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 7 ways as a sum of consecutive naturals, for example, 809 + ... + 1451.

It is an arithmetic number, because the mean of its divisors is an integer number (82593).

2⁷²⁶⁵⁹⁰ is an apocalyptic number.

726590 is a deficient number, since it is larger than the sum of its proper divisors (594898).

726590 is a wasteful number, since it uses less digits than its factorization.

726590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 726590 is about 852.4024870916. The cubic root of 726590 is about 89.9007135545.

The spelling of 726590 in words is "seven hundred twenty-six thousand, five hundred ninety".