1223615344 has 40 divisors (see below), whose sum is σ = 2721120480. Its totient is φ = 522144768.

The previous prime is 1223615339. The next prime is 1223615347. The reversal of 1223615344 is 4435163221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223615347) 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, 2652 + ... + 49540.

It is an arithmetic number, because the mean of its divisors is an integer number (68028012).

Almost surely, 2^1223615344 is an apocalyptic number.

1223615344 is a gapful number since it is divisible by the number (14) 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 1223615344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1360560240).

1223615344 is an abundant number, since it is smaller than the sum of its proper divisors (1497505136).

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

1223615344 is a wasteful number, since it uses less digits than its factorization.

1223615344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47137 (or 47131 counting only the distinct ones).

The product of its digits is 17280, while the sum is 31.

The square root of 1223615344 is about 34980.2136071237. The cubic root of 1223615344 is about 1069.5841817473.

Adding to 1223615344 its reverse (4435163221), we get a palindrome (5658778565).

The spelling of 1223615344 in words is "one billion, two hundred twenty-three million, six hundred fifteen thousand, three hundred forty-four".