729380 has 12 divisors (see below), whose sum is σ = 1531740. Its totient is φ = 291744.

The previous prime is 729373. The next prime is 729389. The reversal of 729380 is 83927.

It can be written as a sum of positive squares in 2 ways, for example, as 256036 + 473344 = 506^2 + 688^2 .

It is not an unprimeable number, because it can be changed into a prime (729389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18215 + ... + 18254.

It is an arithmetic number, because the mean of its divisors is an integer number (127645).

2⁷²⁹³⁸⁰ is an apocalyptic number.

It is an amenable number.

729380 is an abundant number, since it is smaller than the sum of its proper divisors (802360).

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

729380 is a wasteful number, since it uses less digits than its factorization.

729380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36478 (or 36476 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 729380 is about 854.0374699040. The cubic root of 729380 is about 90.0156351437.

The spelling of 729380 in words is "seven hundred twenty-nine thousand, three hundred eighty".