729438 has 16 divisors (see below), whose sum is σ = 1483536. Its totient is φ = 239040.

The previous prime is 729413. The next prime is 729451. The reversal of 729438 is 834927.

729438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 729399 and 729408.

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 729438.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 631 + ... + 1362.

It is an arithmetic number, because the mean of its divisors is an integer number (92721).

2⁷²⁹⁴³⁸ is an apocalyptic number.

729438 is an abundant number, since it is smaller than the sum of its proper divisors (754098).

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

729438 is a wasteful number, since it uses less digits than its factorization.

729438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2059.

The product of its digits is 12096, while the sum is 33.

The square root of 729438 is about 854.0714255845. The cubic root of 729438 is about 90.0180210827.

The spelling of 729438 in words is "seven hundred twenty-nine thousand, four hundred thirty-eight".