1244264560 has 160 divisors (see below), whose sum is σ = 3657480192. Its totient is φ = 382371840.

The previous prime is 1244264543. The next prime is 1244264569. The reversal of 1244264560 is 654624421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244264569) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 448297 + ... + 451063.

Almost surely, 2^1244264560 is an apocalyptic number.

1244264560 is a gapful number since it is divisible by the number (10) 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 1244264560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1828740096).

1244264560 is an abundant number, since it is smaller than the sum of its proper divisors (2413215632).

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

1244264560 is a wasteful number, since it uses less digits than its factorization.

1244264560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2871 (or 2865 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 34.

The square root of 1244264560 is about 35274.1344330375. The cubic root of 1244264560 is about 1075.5672679388.

Adding to 1244264560 its reverse (654624421), we get a palindrome (1898888981).

The spelling of 1244264560 in words is "one billion, two hundred forty-four million, two hundred sixty-four thousand, five hundred sixty".