730720 has 24 divisors (see below), whose sum is σ = 1726704. Its totient is φ = 292224.

The previous prime is 730679. The next prime is 730727. The reversal of 730720 is 27037.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (730727) by changing a digit.

730720 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 3 ways as a sum of consecutive naturals, for example, 2124 + ... + 2443.

It is an arithmetic number, because the mean of its divisors is an integer number (71946).

2⁷³⁰⁷²⁰ is an apocalyptic number.

It is an amenable number.

730720 is an abundant number, since it is smaller than the sum of its proper divisors (995984).

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

730720 is a wasteful number, since it uses less digits than its factorization.

730720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4582 (or 4574 counting only the distinct ones).

The product of its (nonzero) digits is 294, while the sum is 19.

The square root of 730720 is about 854.8216188188. The cubic root of 730720 is about 90.0707262983.

Adding to 730720 its reverse (27037), we get a palindrome (757757).

The spelling of 730720 in words is "seven hundred thirty thousand, seven hundred twenty".