1988227488 has 192 divisors, whose sum is σ = 5960908800. Its totient is φ = 575216640.

The previous prime is 1988227459. The next prime is 1988227499. The reversal of 1988227488 is 8847228891.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4528773 + ... + 4529211.

It is an arithmetic number, because the mean of its divisors is an integer number (31046400).

Almost surely, 2^1988227488 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 1988227488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2980454400).

1988227488 is an abundant number, since it is smaller than the sum of its proper divisors (3972681312).

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

1988227488 is a wasteful number, since it uses less digits than its factorization.

1988227488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675 (or 667 counting only the distinct ones).

The product of its digits is 4128768, while the sum is 57.

The square root of 1988227488 is about 44589.5446040885. The cubic root of 1988227488 is about 1257.4441109402. Note that the first 3 decimals are identical.

The spelling of 1988227488 in words is "one billion, nine hundred eighty-eight million, two hundred twenty-seven thousand, four hundred eighty-eight".