442408111 has 4 divisors (see below), whose sum is σ = 442990224. Its totient is φ = 441826000.

The previous prime is 442408093. The next prime is 442408121. The reversal of 442408111 is 111804244.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 442408111 - 2¹⁹ = 441883823 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 (442408121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 289915 + ... + 291436.

It is an arithmetic number, because the mean of its divisors is an integer number (110747556).

Almost surely, 2^442408111 is an apocalyptic number.

442408111 is a deficient number, since it is larger than the sum of its proper divisors (582113).

442408111 is an equidigital number, since it uses as much as digits as its factorization.

442408111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582112.

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 442408111 is about 21033.4997325695. The cubic root of 442408111 is about 761.9755338507.

The spelling of 442408111 in words is "four hundred forty-two million, four hundred eight thousand, one hundred eleven".