1081805760 has 448 divisors, whose sum is σ = 4510064640. Its totient is φ = 238878720.

The previous prime is 1081805731. The next prime is 1081805801. The reversal of 1081805760 is 675081801.

1081805760 is a `hidden beast` number, since 1 + 0 + 8 + 1 + 80 + 576 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent 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, 1874592 + ... + 1875168.

Almost surely, 2^1081805760 is an apocalyptic number.

1081805760 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 1081805760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2255032320).

1081805760 is an abundant number, since it is smaller than the sum of its proper divisors (3428258880).

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

1081805760 is a wasteful number, since it uses less digits than its factorization.

1081805760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641 (or 625 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 36.

The square root of 1081805760 is about 32890.8157393519. The cubic root of 1081805760 is about 1026.5570655662.

The spelling of 1081805760 in words is "one billion, eighty-one million, eight hundred five thousand, seven hundred sixty".