1091982080 has 288 divisors, whose sum is σ = 3242405376. Its totient is φ = 343867392.

The previous prime is 1091982061. The next prime is 1091982083. The reversal of 1091982080 is 802891901.

It is a super-2 number, since 2×1091982080² = 2384849726082252800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1091982083) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10205387 + ... + 10205493.

It is an arithmetic number, because the mean of its divisors is an integer number (11258352).

Almost surely, 2^1091982080 is an apocalyptic number.

1091982080 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 1091982080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1621202688).

1091982080 is an abundant number, since it is smaller than the sum of its proper divisors (2150423296).

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

1091982080 is a wasteful number, since it uses less digits than its factorization.

1091982080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 38.

The square root of 1091982080 is about 33045.1521406696. The cubic root of 1091982080 is about 1029.7658939465.

The spelling of 1091982080 in words is "one billion, ninety-one million, nine hundred eighty-two thousand, eighty".