1091568960 has 280 divisors, whose sum is σ = 4053937536. Its totient is φ = 278277120.

The previous prime is 1091568911. The next prime is 1091568967. The reversal of 1091568960 is 698651901.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091568967) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 595245 + ... + 597075.

Almost surely, 2^1091568960 is an apocalyptic number.

1091568960 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 1091568960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2026968768).

1091568960 is an abundant number, since it is smaller than the sum of its proper divisors (2962368576).

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

1091568960 is a wasteful number, since it uses less digits than its factorization.

1091568960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1883 (or 1864 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 1091568960 is about 33038.9007081047. The cubic root of 1091568960 is about 1029.6360168013.

The spelling of 1091568960 in words is "one billion, ninety-one million, five hundred sixty-eight thousand, nine hundred sixty".