42240324 has 24 divisors (see below), whose sum is σ = 112641088. Its totient is φ = 12068640.

The previous prime is 42240323. The next prime is 42240349. The reversal of 42240324 is 42304224.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 42240324.

It is not an unprimeable number, because it can be changed into a prime (42240323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251347 + ... + 251514.

Almost surely, 2^42240324 is an apocalyptic number.

It is an amenable number.

42240324 is an abundant number, since it is smaller than the sum of its proper divisors (70400764).

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

42240324 is a wasteful number, since it uses less digits than its factorization.

42240324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502875 (or 502873 counting only the distinct ones).

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

The square root of 42240324 is about 6499.2556496879. The cubic root of 42240324 is about 348.2643980911.

Adding to 42240324 its reverse (42304224), we get a palindrome (84544548).

The spelling of 42240324 in words is "forty-two million, two hundred forty thousand, three hundred twenty-four".