1155244340 has 36 divisors (see below), whose sum is σ = 2493412236. Its totient is φ = 449597952.

The previous prime is 1155244283. The next prime is 1155244369. The reversal of 1155244340 is 434425511.

It can be written as a sum of positive squares in 6 ways, for example, as 186540964 + 968703376 = 13658^2 + 31124^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6284 + ... + 48476.

It is an arithmetic number, because the mean of its divisors is an integer number (69261451).

Almost surely, 2^1155244340 is an apocalyptic number.

1155244340 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 1155244340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1246706118).

1155244340 is an abundant number, since it is smaller than the sum of its proper divisors (1338167896).

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

1155244340 is a wasteful number, since it uses less digits than its factorization.

1155244340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42276 (or 42237 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 1155244340 is about 33988.8855363044. The cubic root of 1155244340 is about 1049.2797297619.

Adding to 1155244340 its reverse (434425511), we get a palindrome (1589669851).

The spelling of 1155244340 in words is "one billion, one hundred fifty-five million, two hundred forty-four thousand, three hundred forty".