42909538 has 8 divisors (see below), whose sum is σ = 73559232. Its totient is φ = 18389796.

The previous prime is 42909533. The next prime is 42909553. The reversal of 42909538 is 83590924.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 42909538.

It is not an unprimeable number, because it can be changed into a prime (42909533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1532470 + ... + 1532497.

It is an arithmetic number, because the mean of its divisors is an integer number (9194904).

Almost surely, 2^42909538 is an apocalyptic number.

42909538 is a deficient number, since it is larger than the sum of its proper divisors (30649694).

42909538 is a wasteful number, since it uses less digits than its factorization.

42909538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3064976.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 42909538 is about 6550.5372298766. The cubic root of 42909538 is about 350.0939557282.

The spelling of 42909538 in words is "forty-two million, nine hundred nine thousand, five hundred thirty-eight".