442560991 has 8 divisors (see below), whose sum is σ = 457127424. Its totient is φ = 428012760.

The previous prime is 442560887. The next prime is 442561001. The reversal of 442560991 is 199065244.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442560991 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 (442560691) 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 7 ways as a sum of consecutive naturals, for example, 59316 + ... + 66358.

It is an arithmetic number, because the mean of its divisors is an integer number (57140928).

Almost surely, 2^442560991 is an apocalyptic number.

442560991 is a deficient number, since it is larger than the sum of its proper divisors (14566433).

442560991 is a wasteful number, since it uses less digits than its factorization.

442560991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9101.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 442560991 is about 21037.1336212898. The cubic root of 442560991 is about 762.0632939987.

The spelling of 442560991 in words is "four hundred forty-two million, five hundred sixty thousand, nine hundred ninety-one".