42166838 has 8 divisors (see below), whose sum is σ = 72286032. Its totient is φ = 18071496.

The previous prime is 42166837. The next prime is 42166867. The reversal of 42166838 is 83866124.

It is a happy number.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42166837) 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, 1505945 + ... + 1505972.

It is an arithmetic number, because the mean of its divisors is an integer number (9035754).

Almost surely, 2^42166838 is an apocalyptic number.

42166838 is a deficient number, since it is larger than the sum of its proper divisors (30119194).

42166838 is a wasteful number, since it uses less digits than its factorization.

42166838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3011926.

The product of its digits is 55296, while the sum is 38.

The square root of 42166838 is about 6493.5997720833. The cubic root of 42166838 is about 348.0623209389.

The spelling of 42166838 in words is "forty-two million, one hundred sixty-six thousand, eight hundred thirty-eight".