1398857349290 has 16 divisors (see below), whose sum is σ = 2523551128200. Its totient is φ = 558296739840.

The previous prime is 1398857349229. The next prime is 1398857349299. The reversal of 1398857349290 is 929437588931.

It is a Cunningham number, because it is equal to 1182733²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 854861120569 + 543996228721 = 924587^2 + 737561^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1398857349290.

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 in 7 ways as a sum of consecutive naturals, for example, 155770271 + ... + 155779250.

Almost surely, 2^{1398857349290} is an apocalyptic number.

1398857349290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1398857349290 is a deficient number, since it is larger than the sum of its proper divisors (1124693778910).

1398857349290 is a wasteful number, since it uses less digits than its factorization.

1398857349290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311549977.

The product of its (nonzero) digits is 117573120, while the sum is 68.

The spelling of 1398857349290 in words is "one trillion, three hundred ninety-eight billion, eight hundred fifty-seven million, three hundred forty-nine thousand, two hundred ninety".