1131543840 has 96 divisors (see below), whose sum is σ = 4073569920. Its totient is φ = 258637824.

The previous prime is 1131543797. The next prime is 1131543859. The reversal of 1131543840 is 483451311.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1131543798 and 1131543807.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165025 + ... + 171744.

It is an arithmetic number, because the mean of its divisors is an integer number (42433020).

Almost surely, 2^1131543840 is an apocalyptic number.

1131543840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131543840 is an abundant number, since it is smaller than the sum of its proper divisors (2942026080).

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

1131543840 is a wasteful number, since it uses less digits than its factorization.

1131543840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336794 (or 336786 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 1131543840 is about 33638.4280251025. The cubic root of 1131543840 is about 1042.0545676260.

It can be divided in two parts, 11315 and 43840, that added together give a palindrome (55155).

The spelling of 1131543840 in words is "one billion, one hundred thirty-one million, five hundred forty-three thousand, eight hundred forty".