442000424 has 8 divisors (see below), whose sum is σ = 828750810. Its totient is φ = 221000208.

The previous prime is 442000423. The next prime is 442000451. The reversal of 442000424 is 424000244.

It can be written as a sum of positive squares in only one way, i.e., 430562500 + 11437924 = 20750^2 + 3382^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 442000396 and 442000405.

It is not an unprimeable number, because it can be changed into a prime (442000423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27625019 + ... + 27625034.

Almost surely, 2^442000424 is an apocalyptic number.

It is an amenable number.

442000424 is a deficient number, since it is larger than the sum of its proper divisors (386750386).

442000424 is a wasteful number, since it uses less digits than its factorization.

442000424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55250059 (or 55250055 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 442000424 is about 21023.8061254379. The cubic root of 442000424 is about 761.7414038826.

Adding to 442000424 its reverse (424000244), we get a palindrome (866000668).

The spelling of 442000424 in words is "four hundred forty-two million, four hundred twenty-four", and thus it is an aban number.