442423191 has 32 divisors (see below), whose sum is σ = 682007040. Its totient is φ = 249895296.

The previous prime is 442423153. The next prime is 442423211. The reversal of 442423191 is 191324244.

It is not a de Polignac number, because 442423191 - 2⁷ = 442423063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442423141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 947140 + ... + 947606.

It is an arithmetic number, because the mean of its divisors is an integer number (21312720).

Almost surely, 2^442423191 is an apocalyptic number.

442423191 is a deficient number, since it is larger than the sum of its proper divisors (239583849).

442423191 is a wasteful number, since it uses less digits than its factorization.

442423191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903.

The product of its digits is 6912, while the sum is 30.

The square root of 442423191 is about 21033.8582052842. The cubic root of 442423191 is about 761.9841913626.

The spelling of 442423191 in words is "four hundred forty-two million, four hundred twenty-three thousand, one hundred ninety-one".