42256220 has 48 divisors (see below), whose sum is σ = 96526080. Its totient is φ = 15473664.

The previous prime is 42256189. The next prime is 42256241. The reversal of 42256220 is 2265224.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10901 + ... + 14259.

It is an arithmetic number, because the mean of its divisors is an integer number (2010960).

Almost surely, 2^42256220 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 42256220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48263040).

42256220 is an abundant number, since it is smaller than the sum of its proper divisors (54269860).

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

42256220 is a wasteful number, since it uses less digits than its factorization.

42256220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3422 (or 3420 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 42256220 is about 6500.4784439301. The cubic root of 42256220 is about 348.3080792316.

The spelling of 42256220 in words is "forty-two million, two hundred fifty-six thousand, two hundred twenty".