42206656 has 56 divisors (see below), whose sum is σ = 89208864. Its totient is φ = 19768320.

The previous prime is 42206641. The next prime is 42206669. The reversal of 42206656 is 65660224.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77746 + ... + 78286.

Almost surely, 2^42206656 is an apocalyptic number.

42206656 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42206656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44604432).

42206656 is an abundant number, since it is smaller than the sum of its proper divisors (47002208).

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

42206656 is a wasteful number, since it uses less digits than its factorization.

42206656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629 (or 619 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 42206656 is about 6496.6649905933. The cubic root of 42206656 is about 348.1718444892.

The spelling of 42206656 in words is "forty-two million, two hundred six thousand, six hundred fifty-six".