728304738 has 48 divisors (see below), whose sum is σ = 1711269504. Its totient is φ = 206018400.

The previous prime is 728304737. The next prime is 728304799. The reversal of 728304738 is 837403827.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 728304738.

It is not an unprimeable number, because it can be changed into a prime (728304737) 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 in 23 ways as a sum of consecutive naturals, for example, 17431 + ... + 41957.

It is an arithmetic number, because the mean of its divisors is an integer number (35651448).

Almost surely, 2^728304738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 728304738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (855634752).

728304738 is an abundant number, since it is smaller than the sum of its proper divisors (982964766).

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

728304738 is a wasteful number, since it uses less digits than its factorization.

728304738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24647 (or 24640 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 42.

The square root of 728304738 is about 26987.1217064733. The cubic root of 728304738 is about 899.7137929442.

The spelling of 728304738 in words is "seven hundred twenty-eight million, three hundred four thousand, seven hundred thirty-eight".