42422240 has 96 divisors (see below), whose sum is σ = 117028800. Its totient is φ = 14525952.

The previous prime is 42422227. The next prime is 42422243. The reversal of 42422240 is 4222424.

42422240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42422243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54494 + ... + 55266.

It is an arithmetic number, because the mean of its divisors is an integer number (1219050).

Almost surely, 2^42422240 is an apocalyptic number.

42422240 is a gapful number since it is divisible by the number (40) 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 42422240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58514400).

42422240 is an abundant number, since it is smaller than the sum of its proper divisors (74606560).

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

42422240 is an equidigital number, since it uses as much as digits as its factorization.

42422240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809 (or 787 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 42422240 is about 6513.2357549838. The cubic root of 42422240 is about 348.7636377379.

Adding to 42422240 its reverse (4222424), we get a palindrome (46644664).

The spelling of 42422240 in words is "forty-two million, four hundred twenty-two thousand, two hundred forty".