442310509 has 8 divisors (see below), whose sum is σ = 447795000. Its totient is φ = 436837632.

The previous prime is 442310461. The next prime is 442310521. The reversal of 442310509 is 905013244.

It can be written as a sum of positive squares in 4 ways, for example, as 112996900 + 329313609 = 10630^2 + 18147^2 .

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

It is not a de Polignac number, because 442310509 - 2⁷ = 442310381 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 (442310909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92817 + ... + 97465.

It is an arithmetic number, because the mean of its divisors is an integer number (55974375).

Almost surely, 2^442310509 is an apocalyptic number.

It is an amenable number.

442310509 is a deficient number, since it is larger than the sum of its proper divisors (5484491).

442310509 is a wasteful number, since it uses less digits than its factorization.

442310509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5807.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 442310509 is about 21031.1794486187. The cubic root of 442310509 is about 761.9194952414.

The spelling of 442310509 in words is "four hundred forty-two million, three hundred ten thousand, five hundred nine".