1091285064 has 96 divisors (see below), whose sum is σ = 3211603200. Its totient is φ = 333486720.

The previous prime is 1091285053. The next prime is 1091285101. The reversal of 1091285064 is 4605821901.

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, 29542 + ... + 55274.

It is an arithmetic number, because the mean of its divisors is an integer number (33454200).

Almost surely, 2^1091285064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1091285064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1605801600).

1091285064 is an abundant number, since it is smaller than the sum of its proper divisors (2120318136).

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

1091285064 is a wasteful number, since it uses less digits than its factorization.

1091285064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25795 (or 25788 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 1091285064 is about 33034.6040387954. The cubic root of 1091285064 is about 1029.5467462490.

The spelling of 1091285064 in words is "one billion, ninety-one million, two hundred eighty-five thousand, sixty-four".