730040320 has 48 divisors (see below), whose sum is σ = 1751693580. Its totient is φ = 292012032.

The previous prime is 730040293. The next prime is 730040329. The reversal of 730040320 is 23040037.

It can be written as a sum of positive squares in 2 ways, for example, as 660284416 + 69755904 = 25696^2 + 8352^2 .

It is not an unprimeable number, because it can be changed into a prime (730040329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25407 + ... + 45886.

Almost surely, 2^730040320 is an apocalyptic number.

It is an amenable number.

730040320 is an abundant number, since it is smaller than the sum of its proper divisors (1021653260).

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

730040320 is an equidigital number, since it uses as much as digits as its factorization.

730040320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71320 (or 71300 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 19.

The square root of 730040320 is about 27019.2583169857. The cubic root of 730040320 is about 900.4279117403.

Adding to 730040320 its reverse (23040037), we get a palindrome (753080357).

The spelling of 730040320 in words is "seven hundred thirty million, forty thousand, three hundred twenty".