1244402442 has 48 divisors (see below), whose sum is σ = 2821029120. Its totient is φ = 395694816.

The previous prime is 1244402437. The next prime is 1244402447. The reversal of 1244402442 is 2442044421.

It is an interprime number because it is at equal distance from previous prime (1244402437) and next prime (1244402447).

It is not an unprimeable number, because it can be changed into a prime (1244402447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 157183 + ... + 164909.

It is an arithmetic number, because the mean of its divisors is an integer number (58771440).

Almost surely, 2^1244402442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1244402442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1410514560).

1244402442 is an abundant number, since it is smaller than the sum of its proper divisors (1576626678).

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

1244402442 is a wasteful number, since it uses less digits than its factorization.

1244402442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8147 (or 8144 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 27.

The square root of 1244402442 is about 35276.0888138127. The cubic root of 1244402442 is about 1075.6069957944.

Adding to 1244402442 its reverse (2442044421), we get a palindrome (3686446863).

The spelling of 1244402442 in words is "one billion, two hundred forty-four million, four hundred two thousand, four hundred forty-two".