42212240 has 80 divisors (see below), whose sum is σ = 114837888. Its totient is φ = 14128128.

The previous prime is 42212237. The next prime is 42212267. The reversal of 42212240 is 4221224.

It is a happy number.

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

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, 23204 + ... + 24956.

Almost surely, 2^42212240 is an apocalyptic number.

42212240 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 42212240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57418944).

42212240 is an abundant number, since it is smaller than the sum of its proper divisors (72625648).

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

42212240 is a wasteful number, since it uses less digits than its factorization.

42212240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1816 (or 1810 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 42212240 is about 6497.0947353413. The cubic root of 42212240 is about 348.1871983538.

Adding to 42212240 its reverse (4221224), we get a palindrome (46433464).

The spelling of 42212240 in words is "forty-two million, two hundred twelve thousand, two hundred forty".