1101091540 has 48 divisors (see below), whose sum is σ = 2376823680. Its totient is φ = 428238720.

The previous prime is 1101091469. The next prime is 1101091561. The reversal of 1101091540 is 451901011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194145 + ... + 199735.

It is an arithmetic number, because the mean of its divisors is an integer number (49517160).

Almost surely, 2^1101091540 is an apocalyptic number.

1101091540 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 1101091540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1188411840).

1101091540 is an abundant number, since it is smaller than the sum of its proper divisors (1275732140).

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

1101091540 is a wasteful number, since it uses less digits than its factorization.

1101091540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5872 (or 5870 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 22.

The square root of 1101091540 is about 33182.6994079746. The cubic root of 1101091540 is about 1032.6214495593.

Adding to 1101091540 its reverse (451901011), we get a palindrome (1552992551).

The spelling of 1101091540 in words is "one billion, one hundred one million, ninety-one thousand, five hundred forty".