728304739 has 4 divisors (see below), whose sum is σ = 728407240. Its totient is φ = 728202240.

The previous prime is 728304737. The next prime is 728304799. The reversal of 728304739 is 937403827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 937403827 = 43 ⋅21800089.

It is a cyclic number.

It is not a de Polignac number, because 728304739 - 2¹ = 728304737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 728304695 and 728304704.

It is not an unprimeable number, because it can be changed into a prime (728304737) 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, 39729 + ... + 55090.

It is an arithmetic number, because the mean of its divisors is an integer number (182101810).

Almost surely, 2^728304739 is an apocalyptic number.

728304739 is a deficient number, since it is larger than the sum of its proper divisors (102501).

728304739 is an equidigital number, since it uses as much as digits as its factorization.

728304739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102500.

The product of its (nonzero) digits is 254016, while the sum is 43.

The square root of 728304739 is about 26987.1217250006. The cubic root of 728304739 is about 899.7137933560.

The spelling of 728304739 in words is "seven hundred twenty-eight million, three hundred four thousand, seven hundred thirty-nine".