42006340 has 24 divisors (see below), whose sum is σ = 92856960. Its totient is φ = 15918048.

The previous prime is 42006331. The next prime is 42006343. The reversal of 42006340 is 4360024.

It is a Harshad number since it is a multiple of its sum of digits (19).

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 7 ways as a sum of consecutive naturals, for example, 54892 + ... + 55651.

It is an arithmetic number, because the mean of its divisors is an integer number (3869040).

Almost surely, 2^42006340 is an apocalyptic number.

It is an amenable number.

42006340 is an abundant number, since it is smaller than the sum of its proper divisors (50850620).

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

42006340 is a wasteful number, since it uses less digits than its factorization.

42006340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110571 (or 110569 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 42006340 is about 6481.2298215694. The cubic root of 42006340 is about 347.6201540919.

Adding to 42006340 its reverse (4360024), we get a palindrome (46366364).

The spelling of 42006340 in words is "forty-two million, six thousand, three hundred forty".