728645703 has 8 divisors (see below), whose sum is σ = 986028288. Its totient is φ = 478513464.

The previous prime is 728645689. The next prime is 728645713. The reversal of 728645703 is 307546827.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 728645703 - 2⁶ = 728645639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728645713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1812351 + ... + 1812752.

It is an arithmetic number, because the mean of its divisors is an integer number (123253536).

Almost surely, 2^728645703 is an apocalyptic number.

728645703 is a deficient number, since it is larger than the sum of its proper divisors (257382585).

728645703 is a wasteful number, since it uses less digits than its factorization.

728645703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3625173.

The product of its (nonzero) digits is 282240, while the sum is 42.

The square root of 728645703 is about 26993.4381470757. The cubic root of 728645703 is about 899.8541751391.

The spelling of 728645703 in words is "seven hundred twenty-eight million, six hundred forty-five thousand, seven hundred three".