729406 has 8 divisors (see below), whose sum is σ = 1099224. Its totient is φ = 363000.

The previous prime is 729403. The next prime is 729413. The reversal of 729406 is 604927.

729406 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×729406² = 1064066225672, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 225 + ... + 1228.

It is an arithmetic number, because the mean of its divisors is an integer number (137403).

2⁷²⁹⁴⁰⁶ is an apocalyptic number.

729406 is a deficient number, since it is larger than the sum of its proper divisors (369818).

729406 is a wasteful number, since it uses less digits than its factorization.

729406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1706.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 729406 is about 854.0526915829. The cubic root of 729406 is about 90.0167047182.

The spelling of 729406 in words is "seven hundred twenty-nine thousand, four hundred six".