730783728 has 80 divisors (see below), whose sum is σ = 2126446240. Its totient is φ = 240247296.

The previous prime is 730783723. The next prime is 730783751. The reversal of 730783728 is 827387037.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (730783723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19950 + ... + 43122.

It is an arithmetic number, because the mean of its divisors is an integer number (26580578).

Almost surely, 2^730783728 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 730783728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1063223120).

730783728 is an abundant number, since it is smaller than the sum of its proper divisors (1395662512).

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

730783728 is a wasteful number, since it uses less digits than its factorization.

730783728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23263 (or 23251 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 45.

The square root of 730783728 is about 27033.0118188854. The cubic root of 730783728 is about 900.7334465667.

The spelling of 730783728 in words is "seven hundred thirty million, seven hundred eighty-three thousand, seven hundred twenty-eight".