728841021385 has 8 divisors (see below), whose sum is σ = 894948975360. Its totient is φ = 569512983984.

The previous prime is 728841021361. The next prime is 728841021407. The reversal of 728841021385 is 583120148827.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 728841021385 - 2⁵ = 728841021353 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1694978905 + ... + 1694979334.

It is an arithmetic number, because the mean of its divisors is an integer number (111868621920).

Almost surely, 2^728841021385 is an apocalyptic number.

It is an amenable number.

728841021385 is a deficient number, since it is larger than the sum of its proper divisors (166107953975).

728841021385 is a wasteful number, since it uses less digits than its factorization.

728841021385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3389958287.

The product of its (nonzero) digits is 860160, while the sum is 49.

The spelling of 728841021385 in words is "seven hundred twenty-eight billion, eight hundred forty-one million, twenty-one thousand, three hundred eighty-five".