42224040 has 96 divisors (see below), whose sum is σ = 139880520. Its totient is φ = 11042304.

The previous prime is 42224033. The next prime is 42224041. The reversal of 42224040 is 4042224.

42224040 is a `hidden beast` number, since 422 + 240 + 4 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 42224004 + 36 = 6498^2 + 6^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (42224041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17974 + ... + 20186.

Almost surely, 2^42224040 is an apocalyptic number.

42224040 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 42224040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69940260).

42224040 is an abundant number, since it is smaller than the sum of its proper divisors (97656480).

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

42224040 is a wasteful number, since it uses less digits than its factorization.

42224040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2283 (or 2276 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 42224040 is about 6498.0027700825. The cubic root of 42224040 is about 348.2196393880.

Adding to 42224040 its reverse (4042224), we get a palindrome (46266264).

The spelling of 42224040 in words is "forty-two million, two hundred twenty-four thousand, forty".