42065808 has 20 divisors (see below), whose sum is σ = 108670128. Its totient is φ = 14021920.

The previous prime is 42065801. The next prime is 42065819. The reversal of 42065808 is 80856024.

It is not an unprimeable number, because it can be changed into a prime (42065801) 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, 438138 + ... + 438233.

Almost surely, 2^42065808 is an apocalyptic number.

42065808 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

42065808 is an abundant number, since it is smaller than the sum of its proper divisors (66604320).

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

42065808 is a wasteful number, since it uses less digits than its factorization.

42065808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876382 (or 876376 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 42065808 is about 6485.8159085808. The cubic root of 42065808 is about 347.7841176571.

The spelling of 42065808 in words is "forty-two million, sixty-five thousand, eight hundred eight".