442708447 has 16 divisors (see below), whose sum is σ = 464032800. Its totient is φ = 421980160.

The previous prime is 442708423. The next prime is 442708451. The reversal of 442708447 is 744807244.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 442708447 - 2¹¹ = 442706399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442708477) 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 15 ways as a sum of consecutive naturals, for example, 476079 + ... + 477007.

It is an arithmetic number, because the mean of its divisors is an integer number (29002050).

Almost surely, 2^442708447 is an apocalyptic number.

442708447 is a deficient number, since it is larger than the sum of its proper divisors (21324353).

442708447 is a wasteful number, since it uses less digits than its factorization.

442708447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1226.

The product of its (nonzero) digits is 200704, while the sum is 40.

The square root of 442708447 is about 21040.6379893767. The cubic root of 442708447 is about 762.1479213755.

The spelling of 442708447 in words is "four hundred forty-two million, seven hundred eight thousand, four hundred forty-seven".