1081287808 has 64 divisors (see below), whose sum is σ = 2224375200. Its totient is φ = 523302912.

The previous prime is 1081287797. The next prime is 1081287827. The reversal of 1081287808 is 8087821801.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 504916 + ... + 507052.

Almost surely, 2^1081287808 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 1081287808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1112187600).

1081287808 is an abundant number, since it is smaller than the sum of its proper divisors (1143087392).

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

1081287808 is an equidigital number, since it uses as much as digits as its factorization.

1081287808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2277 (or 2265 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 43.

The square root of 1081287808 is about 32882.9409876915. The cubic root of 1081287808 is about 1026.3932061547.

The spelling of 1081287808 in words is "one billion, eighty-one million, two hundred eighty-seven thousand, eight hundred eight".