1998479386344 has 64 divisors (see below), whose sum is σ = 5710215974400. Its totient is φ = 570966623424.

The previous prime is 1998479386327. The next prime is 1998479386363. The reversal of 1998479386344 is 4436839748991.

It is a super-3 number, since 3×1998479386344³ (a number of 38 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3351087 + ... + 3902145.

It is an arithmetic number, because the mean of its divisors is an integer number (89222124600).

Almost surely, 2^{1998479386344} is an apocalyptic number.

1998479386344 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1998479386344 is an abundant number, since it is smaller than the sum of its proper divisors (3711736588056).

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

1998479386344 is a wasteful number, since it uses less digits than its factorization.

1998479386344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572662 (or 572658 counting only the distinct ones).

The product of its digits is 1128701952, while the sum is 75.

The spelling of 1998479386344 in words is "one trillion, nine hundred ninety-eight billion, four hundred seventy-nine million, three hundred eighty-six thousand, three hundred forty-four".