442071091 has 16 divisors (see below), whose sum is σ = 562406400. Its totient is φ = 344468040.

The previous prime is 442071083. The next prime is 442071121. The reversal of 442071091 is 190170244.

It is not a de Polignac number, because 442071091 - 2³ = 442071083 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 (442071391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54811 + ... + 62356.

It is an arithmetic number, because the mean of its divisors is an integer number (35150400).

Almost surely, 2^442071091 is an apocalyptic number.

442071091 is a deficient number, since it is larger than the sum of its proper divisors (120335309).

442071091 is a wasteful number, since it uses less digits than its factorization.

442071091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117199 (or 117185 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 442071091 is about 21025.4867006688. The cubic root of 442071091 is about 761.7819974419.

The spelling of 442071091 in words is "four hundred forty-two million, seventy-one thousand, ninety-one".