728145323889 has 8 divisors (see below), whose sum is σ = 1013071755072. Its totient is φ = 464324554320.

The previous prime is 728145323887. The next prime is 728145323951. The reversal of 728145323889 is 988323541827.

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

It is not a de Polignac number, because 728145323889 - 2¹ = 728145323887 is a prime.

It is a super-2 number, since 2×728145323889² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (728145323887) 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, 5276415322 + ... + 5276415459.

It is an arithmetic number, because the mean of its divisors is an integer number (126633969384).

Almost surely, 2^728145323889 is an apocalyptic number.

It is an amenable number.

728145323889 is a deficient number, since it is larger than the sum of its proper divisors (284926431183).

728145323889 is a wasteful number, since it uses less digits than its factorization.

728145323889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10552830807.

The product of its digits is 23224320, while the sum is 60.

The spelling of 728145323889 in words is "seven hundred twenty-eight billion, one hundred forty-five million, three hundred twenty-three thousand, eight hundred eighty-nine".