729404 has 24 divisors (see below), whose sum is σ = 1399440. Its totient is φ = 332592.

The previous prime is 729403. The next prime is 729413. The reversal of 729404 is 404927.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (729403) 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, 8747 + ... + 8829.

It is an arithmetic number, because the mean of its divisors is an integer number (58310).

2⁷²⁹⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

729404 is a deficient number, since it is larger than the sum of its proper divisors (670036).

729404 is a wasteful number, since it uses less digits than its factorization.

729404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 729404 is about 854.0515206942. The cubic root of 729404 is about 90.0166224442.

The spelling of 729404 in words is "seven hundred twenty-nine thousand, four hundred four".