42006444 has 12 divisors (see below), whose sum is σ = 98015064. Its totient is φ = 14002144.

The previous prime is 42006443. The next prime is 42006469. The reversal of 42006444 is 44460024.

42006444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (42006443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1750257 + ... + 1750280.

It is an arithmetic number, because the mean of its divisors is an integer number (8167922).

Almost surely, 2^42006444 is an apocalyptic number.

It is an amenable number.

42006444 is an abundant number, since it is smaller than the sum of its proper divisors (56008620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42006444 is a wasteful number, since it uses less digits than its factorization.

42006444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3500544 (or 3500542 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 42006444 is about 6481.2378447331. The cubic root of 42006444 is about 347.6204409729.

Adding to 42006444 its reverse (44460024), we get a palindrome (86466468).

The spelling of 42006444 in words is "forty-two million, six thousand, four hundred forty-four".