1223540424 has 128 divisors (see below), whose sum is σ = 3457728000. Its totient is φ = 400845312.

The previous prime is 1223540389. The next prime is 1223540431. The reversal of 1223540424 is 4240453221.

1223540424 is a `hidden beast` number, since 1 + 2 + 235 + 4 + 0 + 424 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5119297 + ... + 5119535.

It is an arithmetic number, because the mean of its divisors is an integer number (27013500).

Almost surely, 2^1223540424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1223540424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1728864000).

1223540424 is an abundant number, since it is smaller than the sum of its proper divisors (2234187576).

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

1223540424 is a wasteful number, since it uses less digits than its factorization.

1223540424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564 (or 554 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 1223540424 is about 34979.1426996146. The cubic root of 1223540424 is about 1069.5623516619.

Adding to 1223540424 its reverse (4240453221), we get a palindrome (5463993645).

The spelling of 1223540424 in words is "one billion, two hundred twenty-three million, five hundred forty thousand, four hundred twenty-four".