1153502440 has 64 divisors (see below), whose sum is σ = 2714290560. Its totient is φ = 440352000.

The previous prime is 1153502437. The next prime is 1153502473. The reversal of 1153502440 is 442053511.

It is a happy number.

It is a super-3 number, since 3×1153502440³ (a number of 28 digits) contains 333 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 511315 + ... + 513565.

It is an arithmetic number, because the mean of its divisors is an integer number (42410790).

Almost surely, 2^1153502440 is an apocalyptic number.

1153502440 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 1153502440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1357145280).

1153502440 is an abundant number, since it is smaller than the sum of its proper divisors (1560788120).

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

1153502440 is a wasteful number, since it uses less digits than its factorization.

1153502440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2842 (or 2838 counting only the distinct ones).

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

The square root of 1153502440 is about 33963.2513166805. The cubic root of 1153502440 is about 1048.7520896479.

Adding to 1153502440 its reverse (442053511), we get a palindrome (1595555951).

Subtracting from 1153502440 its reverse (442053511), we obtain a square (711448929 = 26673²).

The spelling of 1153502440 in words is "one billion, one hundred fifty-three million, five hundred two thousand, four hundred forty".