1224705648 has 80 divisors (see below), whose sum is σ = 3354646400. Its totient is φ = 383927040.

The previous prime is 1224705631. The next prime is 1224705673. The reversal of 1224705648 is 8465074221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121938 + ... + 131598.

It is an arithmetic number, because the mean of its divisors is an integer number (41933080).

Almost surely, 2^1224705648 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 1224705648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1677323200).

1224705648 is an abundant number, since it is smaller than the sum of its proper divisors (2129940752).

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

1224705648 is a wasteful number, since it uses less digits than its factorization.

1224705648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9830 (or 9824 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 39.

The square root of 1224705648 is about 34995.7947187944. The cubic root of 1224705648 is about 1069.9017722155.

Adding to 1224705648 its reverse (8465074221), we get a palindrome (9689779869).

The spelling of 1224705648 in words is "one billion, two hundred twenty-four million, seven hundred five thousand, six hundred forty-eight".