1153540240 has 40 divisors (see below), whose sum is σ = 2683399680. Its totient is φ = 461172096.

The previous prime is 1153540237. The next prime is 1153540243. The reversal of 1153540240 is 420453511.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1153540237) and next prime (1153540243).

It is a tau number, because it is divible by the number of its divisors (40).

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 7 ways as a sum of consecutive naturals, for example, 275281 + ... + 279439.

It is an arithmetic number, because the mean of its divisors is an integer number (67084992).

Almost surely, 2^1153540240 is an apocalyptic number.

1153540240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1153540240 is an abundant number, since it is smaller than the sum of its proper divisors (1529859440).

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

1153540240 is a wasteful number, since it uses less digits than its factorization.

1153540240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7639 (or 7633 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1153540240 is about 33963.8077959466. The cubic root of 1153540240 is about 1048.7635453081.

Adding to 1153540240 its reverse (420453511), we get a palindrome (1573993751).

The spelling of 1153540240 in words is "one billion, one hundred fifty-three million, five hundred forty thousand, two hundred forty".