1244445478 has 4 divisors (see below), whose sum is σ = 1866668220. Its totient is φ = 622222738.

The previous prime is 1244445473. The next prime is 1244445533. The reversal of 1244445478 is 8745444421.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244445473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311111368 + ... + 311111371.

It is an arithmetic number, because the mean of its divisors is an integer number (466667055).

Almost surely, 2^1244445478 is an apocalyptic number.

1244445478 is a deficient number, since it is larger than the sum of its proper divisors (622222742).

1244445478 is an equidigital number, since it uses as much as digits as its factorization.

1244445478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622222741.

The product of its digits is 573440, while the sum is 43.

The square root of 1244445478 is about 35276.6987967979. The cubic root of 1244445478 is about 1075.6193951296.

Adding to 1244445478 its reverse (8745444421), we get a palindrome (9989889899).

The spelling of 1244445478 in words is "one billion, two hundred forty-four million, four hundred forty-five thousand, four hundred seventy-eight".