1244394452 has 24 divisors (see below), whose sum is σ = 2489773440. Its totient is φ = 533100960.

The previous prime is 1244394401. The next prime is 1244394457. The reversal of 1244394452 is 2544934421.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244394457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78449 + ... + 92967.

It is an arithmetic number, because the mean of its divisors is an integer number (103740560).

Almost surely, 2^1244394452 is an apocalyptic number.

It is an amenable number.

1244394452 is an abundant number, since it is smaller than the sum of its proper divisors (1245378988).

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

1244394452 is a wasteful number, since it uses less digits than its factorization.

1244394452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17591 (or 17589 counting only the distinct ones).

The product of its digits is 138240, while the sum is 38.

The square root of 1244394452 is about 35275.9755641145. The cubic root of 1244394452 is about 1075.6046937208.

Subtracting 1244394452 from its reverse (2544934421), we obtain a square (1300539969 = 36063²).

The spelling of 1244394452 in words is "one billion, two hundred forty-four million, three hundred ninety-four thousand, four hundred fifty-two".