729450 has 36 divisors (see below), whose sum is σ = 1960998. Its totient is φ = 194400.

The previous prime is 729413. The next prime is 729451. The reversal of 729450 is 54927.

It can be written as a sum of positive squares in 3 ways, for example, as 622521 + 106929 = 789^2 + 327^2 .

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

It is a nialpdrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 729450.

It is not an unprimeable number, because it can be changed into a prime (729451) by changing a digit.

729450 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 17 ways as a sum of consecutive naturals, for example, 361 + ... + 1260.

2⁷²⁹⁴⁵⁰ is an apocalyptic number.

729450 is an abundant number, since it is smaller than the sum of its proper divisors (1231548).

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

729450 is a wasteful number, since it uses less digits than its factorization.

729450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1639 (or 1631 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 729450 is about 854.0784507292. The cubic root of 729450 is about 90.0185147094.

The spelling of 729450 in words is "seven hundred twenty-nine thousand, four hundred fifty".