1988942669280 has 1296 divisors, whose sum is σ = 8418717360144. Its totient is φ = 426259169280.

The previous prime is 1988942669257. The next prime is 1988942669341. The reversal of 1988942669280 is 829662498891.

1988942669280 is a `hidden beast` number, since 1 + 9 + 8 + 89 + 4 + 266 + 9 + 280 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 1988942669199 and 1988942669208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 2878353735 + ... + 2878354425.

It is an arithmetic number, because the mean of its divisors is an integer number (6495923889).

Almost surely, 2^{1988942669280} is an apocalyptic number.

1988942669280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1988942669280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4209358680072).

1988942669280 is an abundant number, since it is smaller than the sum of its proper divisors (6429774690864).

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

1988942669280 is a wasteful number, since it uses less digits than its factorization.

1988942669280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877 (or 840 counting only the distinct ones).

The product of its (nonzero) digits is 214990848, while the sum is 72.

The spelling of 1988942669280 in words is "one trillion, nine hundred eighty-eight billion, nine hundred forty-two million, six hundred sixty-nine thousand, two hundred eighty".