442543405 has 8 divisors (see below), whose sum is σ = 562290552. Its totient is φ = 333209088.

The previous prime is 442543397. The next prime is 442543411. The reversal of 442543405 is 504345244.

It can be written as a sum of positive squares in 4 ways, for example, as 100922116 + 341621289 = 10046^2 + 18483^2 .

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 442543405 - 2³ = 442543397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2603112 + ... + 2603281.

It is an arithmetic number, because the mean of its divisors is an integer number (70286319).

Almost surely, 2^442543405 is an apocalyptic number.

It is an amenable number.

442543405 is a deficient number, since it is larger than the sum of its proper divisors (119747147).

442543405 is a wasteful number, since it uses less digits than its factorization.

442543405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5206415.

The product of its (nonzero) digits is 38400, while the sum is 31.

The square root of 442543405 is about 21036.7156419437. The cubic root of 442543405 is about 762.0531998551.

Adding to 442543405 its reverse (504345244), we get a palindrome (946888649).

The spelling of 442543405 in words is "four hundred forty-two million, five hundred forty-three thousand, four hundred five".