730207728 has 120 divisors (see below), whose sum is σ = 2166992256. Its totient is φ = 229132800.

The previous prime is 730207711. The next prime is 730207729. The reversal of 730207728 is 827702037.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 730207692 and 730207701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (730207729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 162958 + ... + 167378.

Almost surely, 2^730207728 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 730207728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1083496128).

730207728 is an abundant number, since it is smaller than the sum of its proper divisors (1436784528).

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

730207728 is a wasteful number, since it uses less digits than its factorization.

730207728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4503 (or 4494 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 36.

The square root of 730207728 is about 27022.3560778848. The cubic root of 730207728 is about 900.4967331971.

The spelling of 730207728 in words is "seven hundred thirty million, two hundred seven thousand, seven hundred twenty-eight".