1124543640 has 128 divisors (see below), whose sum is σ = 3688312320. Its totient is φ = 272025600.

The previous prime is 1124543639. The next prime is 1124543647. The reversal of 1124543640 is 463454211.

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 = 1124543598 and 1124543607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1124543647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1162437 + ... + 1163403.

It is an arithmetic number, because the mean of its divisors is an integer number (28814940).

Almost surely, 2^1124543640 is an apocalyptic number.

1124543640 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 1124543640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1844156160).

1124543640 is an abundant number, since it is smaller than the sum of its proper divisors (2563768680).

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

1124543640 is a wasteful number, since it uses less digits than its factorization.

1124543640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1873 (or 1869 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 1124543640 is about 33534.2159592259. The cubic root of 1124543640 is about 1039.9012603496.

Adding to 1124543640 its reverse (463454211), we get a palindrome (1587997851).

The spelling of 1124543640 in words is "one billion, one hundred twenty-four million, five hundred forty-three thousand, six hundred forty".