1988565227220 has 192 divisors, whose sum is σ = 6542374116096. Its totient is φ = 444927774720.

The previous prime is 1988565227203. The next prime is 1988565227239. The reversal of 1988565227220 is 227225658891.

It is a super-3 number, since 3×1988565227220³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 79412542 + ... + 79437578.

It is an arithmetic number, because the mean of its divisors is an integer number (34074865188).

Almost surely, 2^{1988565227220} is an apocalyptic number.

1988565227220 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 1988565227220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3271187058048).

1988565227220 is an abundant number, since it is smaller than the sum of its proper divisors (4553808888876).

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

1988565227220 is a wasteful number, since it uses less digits than its factorization.

1988565227220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34330 (or 34328 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 57.

The spelling of 1988565227220 in words is "one trillion, nine hundred eighty-eight billion, five hundred sixty-five million, two hundred twenty-seven thousand, two hundred twenty".