729390 has 32 divisors (see below), whose sum is σ = 1796256. Its totient is φ = 189440.

The previous prime is 729389. The next prime is 729403. The reversal of 729390 is 93927.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 934 + ... + 1526.

It is an arithmetic number, because the mean of its divisors is an integer number (56133).

2⁷²⁹³⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 729390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (898128).

729390 is an abundant number, since it is smaller than the sum of its proper divisors (1066866).

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

729390 is a wasteful number, since it uses less digits than its factorization.

729390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644.

The product of its (nonzero) digits is 3402, while the sum is 30.

The square root of 729390 is about 854.0433244280. The cubic root of 729390 is about 90.0160465215.

The spelling of 729390 in words is "seven hundred twenty-nine thousand, three hundred ninety".