1444004391 has 8 divisors (see below), whose sum is σ = 1927301760. Its totient is φ = 961688312.

The previous prime is 1444004363. The next prime is 1444004399. The reversal of 1444004391 is 1934004441.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1444004391 - 2⁹ = 1444003879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1444004399) 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, 241881 + ... + 247778.

It is an arithmetic number, because the mean of its divisors is an integer number (240912720).

Almost surely, 2^1444004391 is an apocalyptic number.

1444004391 is a deficient number, since it is larger than the sum of its proper divisors (483297369).

1444004391 is an equidigital number, since it uses as much as digits as its factorization.

1444004391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490645.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 1444004391 is about 38000.0577762719. The cubic root of 1444004391 is about 1130.2890092728.

The spelling of 1444004391 in words is "one billion, four hundred forty-four million, four thousand, three hundred ninety-one".