42418240 has 56 divisors (see below), whose sum is σ = 102485952. Its totient is φ = 16719360.

The previous prime is 42418219. The next prime is 42418267. The reversal of 42418240 is 4281424.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21787 + ... + 23653.

Almost surely, 2^42418240 is an apocalyptic number.

42418240 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 42418240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51242976).

42418240 is an abundant number, since it is smaller than the sum of its proper divisors (60067712).

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

42418240 is a wasteful number, since it uses less digits than its factorization.

42418240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1955 (or 1945 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

The square root of 42418240 is about 6512.9286807089. The cubic root of 42418240 is about 348.7526757330.

Adding to 42418240 its reverse (4281424), we get a palindrome (46699664).

The spelling of 42418240 in words is "forty-two million, four hundred eighteen thousand, two hundred forty".