1153544240 has 40 divisors (see below), whose sum is σ = 2683823760. Its totient is φ = 461102336.

The previous prime is 1153544239. The next prime is 1153544251. The reversal of 1153544240 is 424453511.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138926 + ... + 146994.

It is an arithmetic number, because the mean of its divisors is an integer number (67095594).

Almost surely, 2^1153544240 is an apocalyptic number.

1153544240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1153544240 is an abundant number, since it is smaller than the sum of its proper divisors (1530279520).

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

1153544240 is a wasteful number, since it uses less digits than its factorization.

1153544240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9869 (or 9863 counting only the distinct ones).

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

The square root of 1153544240 is about 33963.8666821079. The cubic root of 1153544240 is about 1048.7647575327.

Adding to 1153544240 its reverse (424453511), we get a palindrome (1577997751).

The spelling of 1153544240 in words is "one billion, one hundred fifty-three million, five hundred forty-four thousand, two hundred forty".