1398944998 has 24 divisors (see below), whose sum is σ = 2365445160. Its totient is φ = 615362400.

The previous prime is 1398944971. The next prime is 1398945019. The reversal of 1398944998 is 8994498931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11943 + ... + 54226.

It is an arithmetic number, because the mean of its divisors is an integer number (98560215).

Almost surely, 2^1398944998 is an apocalyptic number.

1398944998 is a deficient number, since it is larger than the sum of its proper divisors (966500162).

1398944998 is a wasteful number, since it uses less digits than its factorization.

1398944998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66244 (or 66213 counting only the distinct ones).

The product of its digits is 20155392, while the sum is 64.

The square root of 1398944998 is about 37402.4731535229. The cubic root of 1398944998 is about 1118.4078669253.

The spelling of 1398944998 in words is "one billion, three hundred ninety-eight million, nine hundred forty-four thousand, nine hundred ninety-eight".