42417856 has 56 divisors (see below), whose sum is σ = 96012000. Its totient is φ = 18419712.

The previous prime is 42417847. The next prime is 42417857. The reversal of 42417856 is 65871424.

It is not an unprimeable number, because it can be changed into a prime (42417857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12645 + ... + 15643.

It is an arithmetic number, because the mean of its divisors is an integer number (1714500).

Almost surely, 2^42417856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42417856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48006000).

42417856 is an abundant number, since it is smaller than the sum of its proper divisors (53594144).

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

42417856 is a wasteful number, since it uses less digits than its factorization.

42417856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3041 (or 3031 counting only the distinct ones).

The product of its digits is 53760, while the sum is 37.

The square root of 42417856 is about 6512.8992008168. The cubic root of 42417856 is about 348.7516233443.

The spelling of 42417856 in words is "forty-two million, four hundred seventeen thousand, eight hundred fifty-six".