1988000272440 has 768 divisors, whose sum is σ = 8274511365120. Its totient is φ = 418022830080.

The previous prime is 1988000272319. The next prime is 1988000272451. The reversal of 1988000272440 is 442720008891.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 271543980 + ... + 271551300.

It is an arithmetic number, because the mean of its divisors is an integer number (10774103340).

Almost surely, 2^{1988000272440} is an apocalyptic number.

1988000272440 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 1988000272440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4137255682560).

1988000272440 is an abundant number, since it is smaller than the sum of its proper divisors (6286511092680).

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

1988000272440 is a wasteful number, since it uses less digits than its factorization.

1988000272440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7674 (or 7658 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The spelling of 1988000272440 in words is "one trillion, nine hundred eighty-eight billion, two hundred seventy-two thousand, four hundred forty".