1089940768 has 48 divisors (see below), whose sum is σ = 2454641280. Its totient is φ = 466684416.

The previous prime is 1089940759. The next prime is 1089940769. The reversal of 1089940768 is 8670499801.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1089940769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 398028 + ... + 400756.

It is an arithmetic number, because the mean of its divisors is an integer number (51138360).

Almost surely, 2^1089940768 is an apocalyptic number.

It is an amenable number.

1089940768 is an abundant number, since it is smaller than the sum of its proper divisors (1364700512).

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

1089940768 is a wasteful number, since it uses less digits than its factorization.

1089940768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4529 (or 4521 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 52.

The square root of 1089940768 is about 33014.2509834768. The cubic root of 1089940768 is about 1029.1238245927.

The spelling of 1089940768 in words is "one billion, eighty-nine million, nine hundred forty thousand, seven hundred sixty-eight".