1988826826404 has 192 divisors, whose sum is σ = 5160954839040. Its totient is φ = 591081216000.

The previous prime is 1988826826381. The next prime is 1988826826421. The reversal of 1988826826404 is 4046286288891.

It is a Harshad number since it is a multiple of its sum of digits (66).

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 63 ways as a sum of consecutive naturals, for example, 814757824 + ... + 814760264.

It is an arithmetic number, because the mean of its divisors is an integer number (26879973120).

Almost surely, 2^{1988826826404} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1988826826404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2580477419520).

1988826826404 is an abundant number, since it is smaller than the sum of its proper divisors (3172128012636).

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

1988826826404 is a wasteful number, since it uses less digits than its factorization.

1988826826404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3082 (or 3080 counting only the distinct ones).

The product of its (nonzero) digits is 84934656, while the sum is 66.

The spelling of 1988826826404 in words is "one trillion, nine hundred eighty-eight billion, eight hundred twenty-six million, eight hundred twenty-six thousand, four hundred four".