1153540244 has 12 divisors (see below), whose sum is σ = 2020118100. Its totient is φ = 576363648.

The previous prime is 1153540243. The next prime is 1153540247. The reversal of 1153540244 is 4420453511.

It can be written as a sum of positive squares in 2 ways, for example, as 288592144 + 864948100 = 16988^2 + 29410^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1153540243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95189 + ... + 106620.

It is an arithmetic number, because the mean of its divisors is an integer number (168343175).

Almost surely, 2^1153540244 is an apocalyptic number.

It is an amenable number.

1153540244 is a deficient number, since it is larger than the sum of its proper divisors (866577856).

1153540244 is a wasteful number, since it uses less digits than its factorization.

1153540244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203242 (or 203240 counting only the distinct ones).

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

The square root of 1153540244 is about 33963.8078548328. The cubic root of 1153540244 is about 1048.7635465204.

Adding to 1153540244 its reverse (4420453511), we get a palindrome (5573993755).

The spelling of 1153540244 in words is "one billion, one hundred fifty-three million, five hundred forty thousand, two hundred forty-four".