1988118309424 has 40 divisors (see below), whose sum is σ = 4152712924640. Its totient is φ = 916613687808.

The previous prime is 1988118309391. The next prime is 1988118309449. The reversal of 1988118309424 is 4249038118891.

It is a super-2 number, since 2×1988118309424² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4905564 + ... + 5295355.

It is an arithmetic number, because the mean of its divisors is an integer number (103817823116).

Almost surely, 2^{1988118309424} is an apocalyptic number.

It is an amenable number.

1988118309424 is an abundant number, since it is smaller than the sum of its proper divisors (2164594615216).

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

1988118309424 is a wasteful number, since it uses less digits than its factorization.

1988118309424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10201877 (or 10201871 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 58.

The spelling of 1988118309424 in words is "one trillion, nine hundred eighty-eight billion, one hundred eighteen million, three hundred nine thousand, four hundred twenty-four".