1153440240 has 40 divisors (see below), whose sum is σ = 3575665488. Its totient is φ = 307584000.

The previous prime is 1153440203. The next prime is 1153440241. The reversal of 1153440240 is 420443511.

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

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1153440240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1153440241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2402761 + ... + 2403240.

Almost surely, 2^1153440240 is an apocalyptic number.

1153440240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1153440240 is an abundant number, since it is smaller than the sum of its proper divisors (2422225248).

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

1153440240 is a wasteful number, since it uses less digits than its factorization.

1153440240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4806017 (or 4806011 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 1153440240 is about 33962.3356087299. The cubic root of 1153440240 is about 1048.7332387840.

Adding to 1153440240 its reverse (420443511), we get a palindrome (1573883751).

The spelling of 1153440240 in words is "one billion, one hundred fifty-three million, four hundred forty thousand, two hundred forty".