1398123118 has 32 divisors (see below), whose sum is σ = 2521497600. Its totient is φ = 568718304.

The previous prime is 1398123109. The next prime is 1398123137. The reversal of 1398123118 is 8113218931.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5230 + ... + 53137.

It is an arithmetic number, because the mean of its divisors is an integer number (78796800).

Almost surely, 2^1398123118 is an apocalyptic number.

1398123118 is a deficient number, since it is larger than the sum of its proper divisors (1123374482).

1398123118 is a wasteful number, since it uses less digits than its factorization.

1398123118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58464.

The product of its digits is 10368, while the sum is 37.

The square root of 1398123118 is about 37391.4845653392. The cubic root of 1398123118 is about 1118.1888025286.

The spelling of 1398123118 in words is "one billion, three hundred ninety-eight million, one hundred twenty-three thousand, one hundred eighteen".