728715723 has 4 divisors (see below), whose sum is σ = 971620968. Its totient is φ = 485810480.

The previous prime is 728715677. The next prime is 728715731. The reversal of 728715723 is 327517827.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 728715723 - 2¹⁰ = 728714699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (728715733) 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, 121452618 + ... + 121452623.

It is an arithmetic number, because the mean of its divisors is an integer number (242905242).

Almost surely, 2^728715723 is an apocalyptic number.

728715723 is a deficient number, since it is larger than the sum of its proper divisors (242905245).

728715723 is a wasteful number, since it uses less digits than its factorization.

728715723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242905244.

The product of its digits is 164640, while the sum is 42.

The square root of 728715723 is about 26994.7350977927. The cubic root of 728715723 is about 899.8829983705.

The spelling of 728715723 in words is "seven hundred twenty-eight million, seven hundred fifteen thousand, seven hundred twenty-three".