1028547081389 has 8 divisors (see below), whose sum is σ = 1033357612320.
Its totient is φ = 1023746399536.
The previous prime is 1028547081329. The next prime is 1028547081391. The reversal of 1028547081389 is 9831807458201.
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 1028547081389 - 212 = 1028547077293 is a prime.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1028547081329) 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, 2252879 + ... + 2670684.
It is an arithmetic number, because the mean of its divisors is an integer number (129169701540).
Almost surely, 21028547081389 is an apocalyptic number.
It is an amenable number.
1028547081389 is a deficient number, since it is larger than the sum of its proper divisors (4810530931).
1028547081389 is an equidigital number, since it uses as much as digits as its factorization.
1028547081389 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 4924539.
The product of its (nonzero) digits is 3870720, while the sum is 56.
The spelling of 1028547081389 in words is "one trillion, twenty-eight billion, five hundred forty-seven million, eighty-one thousand, three hundred eighty-nine".