422020240 has 80 divisors (see below), whose sum is σ = 1044254592. Its totient is φ = 158062592.

The previous prime is 422020231. The next prime is 422020243. The reversal of 422020240 is 42020224.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (422020243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 308037 + ... + 309403.

Almost surely, 2^422020240 is an apocalyptic number.

422020240 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 422020240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (522127296).

422020240 is an abundant number, since it is smaller than the sum of its proper divisors (622234352).

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

422020240 is a wasteful number, since it uses less digits than its factorization.

422020240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1624 (or 1618 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 422020240 is about 20543.1312121595. The cubic root of 422020240 is about 750.0860582731.

Subtracting from 422020240 its sum of digits (16), we obtain a palindrome (422020224).

Adding to 422020240 its reverse (42020224), we get a palindrome (464040464).

The spelling of 422020240 in words is "four hundred twenty-two million, twenty thousand, two hundred forty".