1091284320 has 192 divisors, whose sum is σ = 4055740416. Its totient is φ = 241367040.

The previous prime is 1091284309. The next prime is 1091284343. The reversal of 1091284320 is 234821901.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98922 + ... + 109398.

It is an arithmetic number, because the mean of its divisors is an integer number (21123648).

Almost surely, 2^1091284320 is an apocalyptic number.

1091284320 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 1091284320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2027870208).

1091284320 is an abundant number, since it is smaller than the sum of its proper divisors (2964456096).

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

1091284320 is a wasteful number, since it uses less digits than its factorization.

1091284320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10533 (or 10525 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1091284320 is about 33034.5927778745. The cubic root of 1091284320 is about 1029.5465122793.

The spelling of 1091284320 in words is "one billion, ninety-one million, two hundred eighty-four thousand, three hundred twenty".