730312 has 32 divisors (see below), whose sum is σ = 1536480. Its totient is φ = 322560.

The previous prime is 730297. The next prime is 730321. The reversal of 730312 is 213037.

It is an unprimeable number.

730312 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, 3688 + ... + 3880.

It is an arithmetic number, because the mean of its divisors is an integer number (48015).

2⁷³⁰³¹² 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 730312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (768240).

730312 is an abundant number, since it is smaller than the sum of its proper divisors (806168).

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

730312 is a wasteful number, since it uses less digits than its factorization.

730312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253 (or 249 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 16.

The square root of 730312 is about 854.5829392166. The cubic root of 730312 is about 90.0539594118.

Adding to 730312 its reverse (213037), we get a palindrome (943349).

The spelling of 730312 in words is "seven hundred thirty thousand, three hundred twelve".