1398857349298 has 4 divisors (see below), whose sum is σ = 2098286023950.
Its totient is φ = 699428674648.
The previous prime is 1398857349229. The next prime is 1398857349299. The reversal of 1398857349298 is 8929437588931.
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in only one way, i.e., 1398857349289 + 9 = 1182733^2 + 3^2
It is a Smith number, since the sum of its digits (76) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.
It is not an unprimeable number, because it can be changed into a prime (1398857349299) 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 as a sum of consecutive naturals, namely, 349714337323 + ... + 349714337326.
Almost surely, 21398857349298 is an apocalyptic number.
1398857349298 is a deficient number, since it is larger than the sum of its proper divisors (699428674652).
1398857349298 is an equidigital number, since it uses as much as digits as its factorization.
1398857349298 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 699428674651.
The product of its digits is 940584960, while the sum is 76.
The spelling of 1398857349298 in words is "one trillion, three hundred ninety-eight billion, eight hundred fifty-seven million, three hundred forty-nine thousand, two hundred ninety-eight".