1244220424 has 8 divisors (see below), whose sum is σ = 2332913310. Its totient is φ = 622110208.

The previous prime is 1244220409. The next prime is 1244220427. The reversal of 1244220424 is 4240224421.

It can be written as a sum of positive squares in only one way, i.e., 791296900 + 452923524 = 28130^2 + 21282^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1244220427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77763769 + ... + 77763784.

Almost surely, 2^1244220424 is an apocalyptic number.

It is an amenable number.

1244220424 is a deficient number, since it is larger than the sum of its proper divisors (1088692886).

1244220424 is a wasteful number, since it uses less digits than its factorization.

1244220424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155527559 (or 155527555 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 25.

The square root of 1244220424 is about 35273.5088132723. The cubic root of 1244220424 is about 1075.5545504402.

Adding to 1244220424 its reverse (4240224421), we get a palindrome (5484444845).

The spelling of 1244220424 in words is "one billion, two hundred forty-four million, two hundred twenty thousand, four hundred twenty-four".