729489 has 8 divisors (see below), whose sum is σ = 986272. Its totient is φ = 479520.

The previous prime is 729473. The next prime is 729493. The reversal of 729489 is 984927.

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

It is not a de Polignac number, because 729489 - 2⁴ = 729473 is a prime.

It is a super-2 number, since 2×729489² = 1064308402242, which contains 22 as substring.

It is a Duffinian number.

729489 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (729389) 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, 1447 + ... + 1884.

It is an arithmetic number, because the mean of its divisors is an integer number (123284).

2⁷²⁹⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

729489 is a deficient number, since it is larger than the sum of its proper divisors (256783).

729489 is a wasteful number, since it uses less digits than its factorization.

729489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3407.

The product of its digits is 36288, while the sum is 39.

The square root of 729489 is about 854.1012820503. The cubic root of 729489 is about 90.0201189590.

The spelling of 729489 in words is "seven hundred twenty-nine thousand, four hundred eighty-nine".