42490422 has 72 divisors (see below), whose sum is σ = 104845104. Its totient is φ = 12361248.

The previous prime is 42490421. The next prime is 42490477. The reversal of 42490422 is 22409424.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42490421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 84223 + ... + 84725.

It is an arithmetic number, because the mean of its divisors is an integer number (1456182).

Almost surely, 2^42490422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42490422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52422552).

42490422 is an abundant number, since it is smaller than the sum of its proper divisors (62354682).

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

42490422 is a wasteful number, since it uses less digits than its factorization.

42490422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562 (or 540 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 42490422 is about 6518.4677647435. The cubic root of 42490422 is about 348.9503847061.

Adding to 42490422 its reverse (22409424), we get a palindrome (64899846).

The spelling of 42490422 in words is "forty-two million, four hundred ninety thousand, four hundred twenty-two".