42240432 has 80 divisors (see below), whose sum is σ = 118603520. Its totient is φ = 12877056.

The previous prime is 42240413. The next prime is 42240433. The reversal of 42240432 is 23404224.

It is a junction number, because it is equal to n+sod(n) for n = 42240399 and 42240408.

It is not an unprimeable number, because it can be changed into a prime (42240433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86493 + ... + 86979.

It is an arithmetic number, because the mean of its divisors is an integer number (1482544).

Almost surely, 2^42240432 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 42240432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59301760).

42240432 is an abundant number, since it is smaller than the sum of its proper divisors (76363088).

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

42240432 is a wasteful number, since it uses less digits than its factorization.

42240432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650 (or 644 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 42240432 is about 6499.2639583264. The cubic root of 42240432 is about 348.2646949049.

Adding to 42240432 its reverse (23404224), we get a palindrome (65644656).

The spelling of 42240432 in words is "forty-two million, two hundred forty thousand, four hundred thirty-two".