1081611328 has 112 divisors (see below), whose sum is σ = 2665984000. Its totient is φ = 424880640.

The previous prime is 1081611239. The next prime is 1081611331. The reversal of 1081611328 is 8231161801.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a self number, because there is not a number n which added to its sum of digits gives 1081611328.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 261823 + ... + 265921.

Almost surely, 2^1081611328 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 1081611328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1332992000).

1081611328 is an abundant number, since it is smaller than the sum of its proper divisors (1584372672).

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

1081611328 is a wasteful number, since it uses less digits than its factorization.

1081611328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4168 (or 4158 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 1081611328 is about 32887.8598878066. The cubic root of 1081611328 is about 1026.4955611478.

The spelling of 1081611328 in words is "one billion, eighty-one million, six hundred eleven thousand, three hundred twenty-eight".