42089866 has 32 divisors (see below), whose sum is σ = 78075648. Its totient is φ = 16571520.

The previous prime is 42089851. The next prime is 42089899. The reversal of 42089866 is 66898024.

It is a happy number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 50731 + ... + 51553.

It is an arithmetic number, because the mean of its divisors is an integer number (2439864).

Almost surely, 2^42089866 is an apocalyptic number.

42089866 is a deficient number, since it is larger than the sum of its proper divisors (35985782).

42089866 is a wasteful number, since it uses less digits than its factorization.

42089866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1126.

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 42089866 is about 6487.6703060498. The cubic root of 42089866 is about 347.8504058228.

The spelling of 42089866 in words is "forty-two million, eighty-nine thousand, eight hundred sixty-six".