726404 has 12 divisors (see below), whose sum is σ = 1452864. Its totient is φ = 311304.

The previous prime is 726391. The next prime is 726413. The reversal of 726404 is 404627.

726404 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 726404.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 726404.

It is an unprimeable number.

726404 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, 12944 + ... + 12999.

It is an arithmetic number, because the mean of its divisors is an integer number (121072).

2⁷²⁶⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

726404 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

726404 is a wasteful number, since it uses less digits than its factorization.

726404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25954 (or 25952 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 726404 is about 852.2933767195. The cubic root of 726404 is about 89.8930416626.

The spelling of 726404 in words is "seven hundred twenty-six thousand, four hundred four".