42422656 has 32 divisors (see below), whose sum is σ = 85092480. Its totient is φ = 21066240.

The previous prime is 42422641. The next prime is 42422669. The reversal of 42422656 is 65622424.

It is a tau number, because it is divible by the number of its divisors (32).

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, 19041 + ... + 21151.

It is an arithmetic number, because the mean of its divisors is an integer number (2659140).

Almost surely, 2^42422656 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 42422656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42546240).

42422656 is an abundant number, since it is smaller than the sum of its proper divisors (42669824).

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

42422656 is a wasteful number, since it uses less digits than its factorization.

42422656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2282 (or 2270 counting only the distinct ones).

The product of its digits is 23040, while the sum is 31.

The square root of 42422656 is about 6513.2676898773. The cubic root of 42422656 is about 348.7647777468.

The spelling of 42422656 in words is "forty-two million, four hundred twenty-two thousand, six hundred fifty-six".