1224540018 has 80 divisors (see below), whose sum is σ = 2972909016. Its totient is φ = 374492160.

The previous prime is 1224540013. The next prime is 1224540019. The reversal of 1224540018 is 8100454221.

1224540018 is a `hidden beast` number, since 1 + 2 + 245 + 400 + 18 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1167793929 + 56746089 = 34173^2 + 7533^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1224539973 and 1224540000.

It is not an unprimeable number, because it can be changed into a prime (1224540011) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 362658 + ... + 366018.

Almost surely, 2^1224540018 is an apocalyptic number.

1224540018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1224540018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1486454508).

1224540018 is an abundant number, since it is smaller than the sum of its proper divisors (1748368998).

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

1224540018 is a wasteful number, since it uses less digits than its factorization.

1224540018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3561 (or 3552 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 1224540018 is about 34993.4282115942. The cubic root of 1224540018 is about 1069.8535386338.

Adding to 1224540018 its reverse (8100454221), we get a palindrome (9324994239).

The spelling of 1224540018 in words is "one billion, two hundred twenty-four million, five hundred forty thousand, eighteen".