1091046960 has 120 divisors (see below), whose sum is σ = 3674973120. Its totient is φ = 290082816.

The previous prime is 1091046947. The next prime is 1091046991. The reversal of 1091046960 is 696401901.

It is a Cunningham number, because it is equal to 33031²-1.

It is a tau number, because it is divible by the number of its divisors (120).

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 262176 + ... + 266304.

It is an arithmetic number, because the mean of its divisors is an integer number (30624776).

Almost surely, 2^1091046960 is an apocalyptic number.

1091046960 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 1091046960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1837486560).

1091046960 is an abundant number, since it is smaller than the sum of its proper divisors (2583926160).

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

1091046960 is a wasteful number, since it uses less digits than its factorization.

1091046960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4515 (or 4506 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 1091046960 is about 33030.9999848627. Note that the first 4 decimals coincide. The cubic root of 1091046960 is about 1029.4718629646.

The spelling of 1091046960 in words is "one billion, ninety-one million, forty-six thousand, nine hundred sixty".