42170838 has 8 divisors (see below), whose sum is σ = 84341688. Its totient is φ = 14056944.

The previous prime is 42170783. The next prime is 42170839. The reversal of 42170838 is 83807124.

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

42170838 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 42170799 and 42170808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42170839) 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, 3514231 + ... + 3514242.

It is an arithmetic number, because the mean of its divisors is an integer number (10542711).

Almost surely, 2^42170838 is an apocalyptic number.

42170838 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.

42170838 is a wasteful number, since it uses less digits than its factorization.

42170838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7028478.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 42170838 is about 6493.9077603551. The cubic root of 42170838 is about 348.0733264694.

The spelling of 42170838 in words is "forty-two million, one hundred seventy thousand, eight hundred thirty-eight".