42805816 has 16 divisors (see below), whose sum is σ = 80355600. Its totient is φ = 21377664.

The previous prime is 42805811. The next prime is 42805817. The reversal of 42805816 is 61850824.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42805811) 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 3 ways as a sum of consecutive naturals, for example, 5421 + ... + 10723.

It is an arithmetic number, because the mean of its divisors is an integer number (5022225).

Almost surely, 2^42805816 is an apocalyptic number.

It is an amenable number.

42805816 is a deficient number, since it is larger than the sum of its proper divisors (37549784).

42805816 is a wasteful number, since it uses less digits than its factorization.

42805816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6318 (or 6314 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 42805816 is about 6542.6153791890. The cubic root of 42805816 is about 349.8116428690.

The spelling of 42805816 in words is "forty-two million, eight hundred five thousand, eight hundred sixteen".