42240234420 has 144 divisors (see below), whose sum is σ = 133214372928. Its totient is φ = 10825182720.

The previous prime is 42240234397. The next prime is 42240234437. The reversal of 42240234420 is 2443204224.

42240234420 is a `hidden beast` number, since 4 + 2 + 2 + 4 + 0 + 234 + 420 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 451747 + ... + 537173.

It is an arithmetic number, because the mean of its divisors is an integer number (925099812).

Almost surely, 2^42240234420 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 42240234420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66607186464).

42240234420 is an abundant number, since it is smaller than the sum of its proper divisors (90974138508).

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

42240234420 is a wasteful number, since it uses less digits than its factorization.

42240234420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85550 (or 85545 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 27.

Adding to 42240234420 its reverse (2443204224), we get a palindrome (44683438644).

The spelling of 42240234420 in words is "forty-two billion, two hundred forty million, two hundred thirty-four thousand, four hundred twenty".