729020 has 12 divisors (see below), whose sum is σ = 1530984. Its totient is φ = 291600.

The previous prime is 729019. The next prime is 729023. The reversal of 729020 is 20927.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 36451 = 729020 / (7 + 2 + 9 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 728983 and 729001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (729023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18206 + ... + 18245.

It is an arithmetic number, because the mean of its divisors is an integer number (127582).

2⁷²⁹⁰²⁰ is an apocalyptic number.

It is an amenable number.

729020 is an abundant number, since it is smaller than the sum of its proper divisors (801964).

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

729020 is a wasteful number, since it uses less digits than its factorization.

729020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36460 (or 36458 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 729020 is about 853.8266803046. The cubic root of 729020 is about 90.0008230377. Note that the first 3 decimals are identical.

Subtracting from 729020 its sum of digits (20), we obtain a cube (729000 = 90³).

Adding to 729020 its reverse (20927), we get a palindrome (749947).

The spelling of 729020 in words is "seven hundred twenty-nine thousand, twenty".