730020 has 48 divisors (see below), whose sum is σ = 2136960. Its totient is φ = 186208.

The previous prime is 730003. The next prime is 730021. The reversal of 730020 is 20037.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 729978 and 730005.

It is a Saint-Exupery number, since it is equal to the product of the sides of a Pythagorean triangle: 115 × 69 × 92.

It is not an unprimeable number, because it can be changed into a prime (730021) by changing a digit.

730020 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 15 ways as a sum of consecutive naturals, for example, 31729 + ... + 31751.

It is an arithmetic number, because the mean of its divisors is an integer number (44520).

2⁷³⁰⁰²⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 730020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1068480).

730020 is an abundant number, since it is smaller than the sum of its proper divisors (1406940).

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

730020 is a wasteful number, since it uses less digits than its factorization.

730020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81 (or 33 counting only the distinct ones).

The product of its (nonzero) digits is 42, while the sum is 12.

The square root of 730020 is about 854.4120785663. The cubic root of 730020 is about 90.0419557469.

Adding to 730020 its reverse (20037), we get a palindrome (750057).

The spelling of 730020 in words is "seven hundred thirty thousand, twenty".