1153504240 has 80 divisors (see below), whose sum is σ = 3136370688. Its totient is φ = 386281728.

The previous prime is 1153504207. The next prime is 1153504241. The reversal of 1153504240 is 424053511.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1153504241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129 + ... + 48031.

Almost surely, 2^1153504240 is an apocalyptic number.

1153504240 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 1153504240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1568185344).

1153504240 is an abundant number, since it is smaller than the sum of its proper divisors (1982866448).

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

1153504240 is a wasteful number, since it uses less digits than its factorization.

1153504240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47966 (or 47960 counting only the distinct ones).

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

The square root of 1153504240 is about 33963.2778158999. The cubic root of 1153504240 is about 1048.7526351612.

Adding to 1153504240 its reverse (424053511), we get a palindrome (1577557751).

The spelling of 1153504240 in words is "one billion, one hundred fifty-three million, five hundred four thousand, two hundred forty".