1398857349289 has 9 divisors (see below), whose sum is σ = 1403738859229.
Its totient is φ = 1393992768460.
The previous prime is 1398857349229. The next prime is 1398857349299. The reversal of 1398857349289 is 9829437588931.
The square root of 1398857349289 is 1182733.
It is a perfect power (a square), and thus also a powerful number.
It is not a de Polignac number, because 1398857349289 - 27 = 1398857349161 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (1398857349229) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 367828062 + ... + 367831864.
Almost surely, 21398857349289 is an apocalyptic number.
1398857349289 is the 1182733-rd square number.
1398857349289 is the 591367-th centered octagonal number.
It is an amenable number.
1398857349289 is a deficient number, since it is larger than the sum of its proper divisors (4881509940).
1398857349289 is an frugal number, since it uses more digits than its factorization.
1398857349289 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 8228 (or 4114 counting only the distinct ones).
The product of its digits is 940584960, while the sum is 76.
The spelling of 1398857349289 in words is "one trillion, three hundred ninety-eight billion, eight hundred fifty-seven million, three hundred forty-nine thousand, two hundred eighty-nine".