1445728731446 has 8 divisors (see below), whose sum is σ = 2169122939184. Its totient is φ = 722687751720.

The previous prime is 1445728731439. The next prime is 1445728731449. The reversal of 1445728731446 is 6441378275441.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1445728731391 and 1445728731400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1445728731449) 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 3 ways as a sum of consecutive naturals, for example, 88296770 + ... + 88313141.

It is an arithmetic number, because the mean of its divisors is an integer number (271140367398).

Almost surely, 2^{1445728731446} is an apocalyptic number.

1445728731446 is a deficient number, since it is larger than the sum of its proper divisors (723394207738).

1445728731446 is a wasteful number, since it uses less digits than its factorization.

1445728731446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176614006.

The product of its digits is 18063360, while the sum is 56.

The spelling of 1445728731446 in words is "one trillion, four hundred forty-five billion, seven hundred twenty-eight million, seven hundred thirty-one thousand, four hundred forty-six".