42090244 has 48 divisors (see below), whose sum is σ = 90133120. Its totient is φ = 16796160.

The previous prime is 42090227. The next prime is 42090247. The reversal of 42090244 is 44209024.

It is not an unprimeable number, because it can be changed into a prime (42090247) 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, 31804 + ... + 33100.

Almost surely, 2^42090244 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 42090244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45066560).

42090244 is an abundant number, since it is smaller than the sum of its proper divisors (48042876).

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

42090244 is a wasteful number, since it uses less digits than its factorization.

42090244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388 (or 1386 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 42090244 is about 6487.6994381676. The cubic root of 42090244 is about 347.8514471428.

Adding to 42090244 its reverse (44209024), we get a palindrome (86299268).

The spelling of 42090244 in words is "forty-two million, ninety thousand, two hundred forty-four".