1081728648 has 256 divisors, whose sum is σ = 4035225600. Its totient is φ = 259303680.

The previous prime is 1081728631. The next prime is 1081728667. The reversal of 1081728648 is 8468271801.

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, 213715 + ... + 218717.

It is an arithmetic number, because the mean of its divisors is an integer number (15762600).

Almost surely, 2^1081728648 is an apocalyptic number.

1081728648 is a gapful number since it is divisible by the number (18) 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 1081728648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2017612800).

1081728648 is an abundant number, since it is smaller than the sum of its proper divisors (2953496952).

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

1081728648 is a wasteful number, since it uses less digits than its factorization.

1081728648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5049 (or 5039 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 45.

The square root of 1081728648 is about 32889.6434763285. The cubic root of 1081728648 is about 1026.5326737107.

The spelling of 1081728648 in words is "one billion, eighty-one million, seven hundred twenty-eight thousand, six hundred forty-eight".