730621328 has 10 divisors (see below), whose sum is σ = 1415578854. Its totient is φ = 365310656.

The previous prime is 730621321. The next prime is 730621343. The reversal of 730621328 is 823126037.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 457446544 + 273174784 = 21388^2 + 16528^2 .

It is a junction number, because it is equal to n+sod(n) for n = 730621294 and 730621303.

It is not an unprimeable number, because it can be changed into a prime (730621321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22831901 + ... + 22831932.

Almost surely, 2^730621328 is an apocalyptic number.

It is an amenable number.

730621328 is a deficient number, since it is larger than the sum of its proper divisors (684957526).

730621328 is a wasteful number, since it uses less digits than its factorization.

730621328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45663841 (or 45663835 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 730621328 is about 27030.0079171280. The cubic root of 730621328 is about 900.6667191419. Note that the first 3 decimals are identical.

The spelling of 730621328 in words is "seven hundred thirty million, six hundred twenty-one thousand, three hundred twenty-eight".