42424340 has 96 divisors (see below), whose sum is σ = 110073600. Its totient is φ = 13409280.

The previous prime is 42424331. The next prime is 42424357. The reversal of 42424340 is 4342424.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108866 + ... + 109254.

It is an arithmetic number, because the mean of its divisors is an integer number (1146600).

Almost surely, 2^42424340 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 42424340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55036800).

42424340 is an abundant number, since it is smaller than the sum of its proper divisors (67649260).

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

42424340 is a wasteful number, since it uses less digits than its factorization.

42424340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465 (or 463 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 23.

The square root of 42424340 is about 6513.3969631829. The cubic root of 42424340 is about 348.7693925146.

Adding to 42424340 its reverse (4342424), we get a palindrome (46766764).

The spelling of 42424340 in words is "forty-two million, four hundred twenty-four thousand, three hundred forty".