42805866 has 8 divisors (see below), whose sum is σ = 85611744. Its totient is φ = 14268620.

The previous prime is 42805849. The next prime is 42805877. The reversal of 42805866 is 66850824.

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

42805866 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3567150 + ... + 3567161.

It is an arithmetic number, because the mean of its divisors is an integer number (10701468).

Almost surely, 2^42805866 is an apocalyptic number.

42805866 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

42805866 is a wasteful number, since it uses less digits than its factorization.

42805866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7134316.

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 42805866 is about 6542.6192002897. The cubic root of 42805866 is about 349.8117790699.

The spelling of 42805866 in words is "forty-two million, eight hundred five thousand, eight hundred sixty-six".