1140781056 has 208 divisors, whose sum is σ = 3321483264. Its totient is φ = 346816512.

The previous prime is 1140781051. The next prime is 1140781067. The reversal of 1140781056 is 6501870411.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1140781051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8982465 + ... + 8982591.

Almost surely, 2^1140781056 is an apocalyptic number.

1140781056 is a gapful number since it is divisible by the number (16) 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 1140781056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1660741632).

1140781056 is an abundant number, since it is smaller than the sum of its proper divisors (2180702208).

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

1140781056 is a wasteful number, since it uses less digits than its factorization.

1140781056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214 (or 192 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 33.

The square root of 1140781056 is about 33775.4504929246. The cubic root of 1140781056 is about 1044.8824470380.

The spelling of 1140781056 in words is "one billion, one hundred forty million, seven hundred eighty-one thousand, fifty-six".