442360309 has 8 divisors (see below), whose sum is σ = 446768280. Its totient is φ = 437961216.

The previous prime is 442360279. The next prime is 442360327. The reversal of 442360309 is 903063244.

It can be written as a sum of positive squares in 4 ways, for example, as 75637809 + 366722500 = 8697^2 + 19150^2 .

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 442360309 - 2¹¹ = 442358261 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 (442360339) 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, 144139 + ... + 147175.

It is an arithmetic number, because the mean of its divisors is an integer number (55846035).

Almost surely, 2^442360309 is an apocalyptic number.

It is an amenable number.

442360309 is a deficient number, since it is larger than the sum of its proper divisors (4407971).

442360309 is a wasteful number, since it uses less digits than its factorization.

442360309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4439.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 442360309 is about 21032.3633717184. The cubic root of 442360309 is about 761.9480891562.

The spelling of 442360309 in words is "four hundred forty-two million, three hundred sixty thousand, three hundred nine".