1988488320 has 512 divisors, whose sum is σ = 8225280000. Its totient is φ = 396804096.

The previous prime is 1988488319. The next prime is 1988488343. The reversal of 1988488320 is 238848891.

It is a happy 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, 3319381 + ... + 3319979.

It is an arithmetic number, because the mean of its divisors is an integer number (16065000).

Almost surely, 2^1988488320 is an apocalyptic number.

1988488320 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 1988488320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4112640000).

1988488320 is an abundant number, since it is smaller than the sum of its proper divisors (6236791680).

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

1988488320 is a wasteful number, since it uses less digits than its factorization.

1988488320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660 (or 648 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 51.

The square root of 1988488320 is about 44592.4693193817. The cubic root of 1988488320 is about 1257.4990958154.

The spelling of 1988488320 in words is "one billion, nine hundred eighty-eight million, four hundred eighty-eight thousand, three hundred twenty".