1244320402 has 16 divisors (see below), whose sum is σ = 2010684312. Its totient is φ = 574122240.

The previous prime is 1244320387. The next prime is 1244320409. The reversal of 1244320402 is 2040234421.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 743053081 + 501267321 = 27259^2 + 22389^2 .

It is not an unprimeable number, because it can be changed into a prime (1244320409) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 115402 + ... + 125722.

Almost surely, 2^1244320402 is an apocalyptic number.

1244320402 is a deficient number, since it is larger than the sum of its proper divisors (766363910).

1244320402 is a wasteful number, since it uses less digits than its factorization.

1244320402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14973.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 1244320402 is about 35274.9259673213. The cubic root of 1244320402 is about 1075.5833580134.

Adding to 1244320402 its reverse (2040234421), we get a palindrome (3284554823).

The spelling of 1244320402 in words is "one billion, two hundred forty-four million, three hundred twenty thousand, four hundred two".