42166844 has 12 divisors (see below), whose sum is σ = 74803344. Its totient is φ = 20794464.

The previous prime is 42166837. The next prime is 42166867. The reversal of 42166844 is 44866124.

It is a zygodrome in base 3.

It is a congruent 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, 71912 + ... + 72495.

It is an arithmetic number, because the mean of its divisors is an integer number (6233612).

Almost surely, 2^42166844 is an apocalyptic number.

It is an amenable number.

42166844 is a deficient number, since it is larger than the sum of its proper divisors (32636500).

42166844 is a wasteful number, since it uses less digits than its factorization.

42166844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144484 (or 144482 counting only the distinct ones).

The product of its digits is 36864, while the sum is 35.

The square root of 42166844 is about 6493.6002340766. The cubic root of 42166844 is about 348.0623374478.

The spelling of 42166844 in words is "forty-two million, one hundred sixty-six thousand, eight hundred forty-four".