42006344 has 24 divisors (see below), whose sum is σ = 80507190. Its totient is φ = 20547648.

The previous prime is 42006343. The next prime is 42006347. The reversal of 42006344 is 44360024.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 37332100 + 4674244 = 6110^2 + 2162^2 .

It is not an unprimeable number, because it can be changed into a prime (42006343) 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 in 5 ways as a sum of consecutive naturals, for example, 16484 + ... + 18860.

Almost surely, 2^42006344 is an apocalyptic number.

It is an amenable number.

42006344 is a deficient number, since it is larger than the sum of its proper divisors (38500846).

42006344 is a wasteful number, since it uses less digits than its factorization.

42006344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2477 (or 2426 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 42006344 is about 6481.2301301528. The cubic root of 42006344 is about 347.6201651258.

Adding to 42006344 its reverse (44360024), we get a palindrome (86366368).

The spelling of 42006344 in words is "forty-two million, six thousand, three hundred forty-four".