1398373998 has 64 divisors (see below), whose sum is σ = 3389465088. Its totient is φ = 375459840.

The previous prime is 1398373979. The next prime is 1398374011. The reversal of 1398373998 is 8993738931.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 692286 + ... + 694302.

It is an arithmetic number, because the mean of its divisors is an integer number (52960392).

Almost surely, 2^1398373998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1398373998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1694732544).

1398373998 is an abundant number, since it is smaller than the sum of its proper divisors (1991091090).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1398373998 is a wasteful number, since it uses less digits than its factorization.

1398373998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3017.

The product of its digits is 8817984, while the sum is 60.

The square root of 1398373998 is about 37394.8391893855. The cubic root of 1398373998 is about 1118.2556813381.

The spelling of 1398373998 in words is "one billion, three hundred ninety-eight million, three hundred seventy-three thousand, nine hundred ninety-eight".