442390647709 has 32 divisors (see below), whose sum is σ = 493980664320. Its totient is φ = 394207736832.

The previous prime is 442390647691. The next prime is 442390647817. The reversal of 442390647709 is 907746093244.

It is a cyclic number.

It is not a de Polignac number, because 442390647709 - 2²⁹ = 441853776797 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 442390647709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442390641709) 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 31 ways as a sum of consecutive naturals, for example, 64456812 + ... + 64463674.

It is an arithmetic number, because the mean of its divisors is an integer number (15436895760).

Almost surely, 2^442390647709 is an apocalyptic number.

It is an amenable number.

442390647709 is a deficient number, since it is larger than the sum of its proper divisors (51590016611).

442390647709 is a wasteful number, since it uses less digits than its factorization.

442390647709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9429.

The product of its (nonzero) digits is 9144576, while the sum is 55.

The spelling of 442390647709 in words is "four hundred forty-two billion, three hundred ninety million, six hundred forty-seven thousand, seven hundred nine".