1244645424 has 120 divisors (see below), whose sum is σ = 3846128832. Its totient is φ = 372581760.

The previous prime is 1244645417. The next prime is 1244645447. The reversal of 1244645424 is 4245464421.

1244645424 is a `hidden beast` number, since 1 + 2 + 4 + 4 + 645 + 4 + 2 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 126739 + ... + 136205.

Almost surely, 2^1244645424 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 1244645424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1923064416).

1244645424 is an abundant number, since it is smaller than the sum of its proper divisors (2601483408).

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

1244645424 is a wasteful number, since it uses less digits than its factorization.

1244645424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9575 (or 9566 counting only the distinct ones).

The product of its digits is 122880, while the sum is 36.

The square root of 1244645424 is about 35279.5326499658. The cubic root of 1244645424 is about 1075.6769989064.

The spelling of 1244645424 in words is "one billion, two hundred forty-four million, six hundred forty-five thousand, four hundred twenty-four".