728345753 has 4 divisors (see below), whose sum is σ = 766679760. Its totient is φ = 690011748.

The previous prime is 728345741. The next prime is 728345767. The reversal of 728345753 is 357543827.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-728345753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728345953) 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, 19166975 + ... + 19167012.

It is an arithmetic number, because the mean of its divisors is an integer number (191669940).

Almost surely, 2^728345753 is an apocalyptic number.

It is an amenable number.

728345753 is a deficient number, since it is larger than the sum of its proper divisors (38334007).

728345753 is a wasteful number, since it uses less digits than its factorization.

728345753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38334006.

The product of its digits is 705600, while the sum is 44.

The square root of 728345753 is about 26987.8815952642. The cubic root of 728345753 is about 899.7306819681.

It can be divided in two parts, 72834 and 5753, that added together give a palindrome (78587).

The spelling of 728345753 in words is "seven hundred twenty-eight million, three hundred forty-five thousand, seven hundred fifty-three".