1091535072 has 48 divisors (see below), whose sum is σ = 2878912512. Its totient is φ = 362113920.

The previous prime is 1091535061. The next prime is 1091535073. The reversal of 1091535072 is 2705351901.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091535073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6688 + ... + 47199.

It is an arithmetic number, because the mean of its divisors is an integer number (59977344).

Almost surely, 2^1091535072 is an apocalyptic number.

1091535072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1091535072 is an abundant number, since it is smaller than the sum of its proper divisors (1787377440).

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

1091535072 is a wasteful number, since it uses less digits than its factorization.

1091535072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54111 (or 54103 counting only the distinct ones).

The product of its (nonzero) digits is 9450, while the sum is 33.

The square root of 1091535072 is about 33038.3878541311. The cubic root of 1091535072 is about 1029.6253615983.

Adding to 1091535072 its reverse (2705351901), we get a palindrome (3796886973).

The spelling of 1091535072 in words is "one billion, ninety-one million, five hundred thirty-five thousand, seventy-two".