1223440544 has 48 divisors (see below), whose sum is σ = 2492259840. Its totient is φ = 590580480.

The previous prime is 1223440481. The next prime is 1223440549. The reversal of 1223440544 is 4450443221.

It is not an unprimeable number, because it can be changed into a prime (1223440549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 503717 + ... + 506139.

It is an arithmetic number, because the mean of its divisors is an integer number (51922080).

Almost surely, 2^1223440544 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 1223440544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1246129920).

1223440544 is an abundant number, since it is smaller than the sum of its proper divisors (1268819296).

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

1223440544 is a wasteful number, since it uses less digits than its factorization.

1223440544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2973 (or 2965 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 29.

The square root of 1223440544 is about 34977.7149625301. The cubic root of 1223440544 is about 1069.5332473804.

Adding to 1223440544 its reverse (4450443221), we get a palindrome (5673883765).

The spelling of 1223440544 in words is "one billion, two hundred twenty-three million, four hundred forty thousand, five hundred forty-four".