730305140 has 24 divisors (see below), whose sum is σ = 1554652680. Its totient is φ = 288119808.

The previous prime is 730305139. The next prime is 730305167. The reversal of 730305140 is 41503037.

It is a happy number.

730305140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 217916644 + 512388496 = 14762^2 + 22636^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248645 + ... + 251564.

It is an arithmetic number, because the mean of its divisors is an integer number (64777195).

Almost surely, 2^730305140 is an apocalyptic number.

It is an amenable number.

730305140 is an abundant number, since it is smaller than the sum of its proper divisors (824347540).

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

730305140 is a wasteful number, since it uses less digits than its factorization.

730305140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500291 (or 500289 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 730305140 is about 27024.1584512821. The cubic root of 730305140 is about 900.5367744457.

Adding to 730305140 its reverse (41503037), we get a palindrome (771808177).

The spelling of 730305140 in words is "seven hundred thirty million, three hundred five thousand, one hundred forty".