730920 has 32 divisors (see below), whose sum is σ = 2193120. Its totient is φ = 194880.

The previous prime is 730913. The next prime is 730943. The reversal of 730920 is 29037.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 730920.

It is an unprimeable number.

730920 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 7 ways as a sum of consecutive naturals, for example, 2926 + ... + 3165.

It is an arithmetic number, because the mean of its divisors is an integer number (68535).

2⁷³⁰⁹²⁰ is an apocalyptic number.

It is an amenable number.

730920 is an abundant number, since it is smaller than the sum of its proper divisors (1462200).

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

730920 is a wasteful number, since it uses less digits than its factorization.

730920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6105 (or 6101 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 21.

The square root of 730920 is about 854.9385942862. The cubic root of 730920 is about 90.0789430809.

Adding to 730920 its reverse (29037), we get a palindrome (759957).

The spelling of 730920 in words is "seven hundred thirty thousand, nine hundred twenty".