42330440 has 32 divisors (see below), whose sum is σ = 95447160. Its totient is φ = 16896000.

The previous prime is 42330439. The next prime is 42330443. The reversal of 42330440 is 4403324.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 42172036 + 158404 = 6494^2 + 398^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (42330443) 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 7 ways as a sum of consecutive naturals, for example, 25640 + ... + 27240.

Almost surely, 2^42330440 is an apocalyptic number.

42330440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42330440 is an abundant number, since it is smaller than the sum of its proper divisors (53116720).

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

42330440 is a wasteful number, since it uses less digits than its factorization.

42330440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2273 (or 2269 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 42330440 is about 6506.1847499130. The cubic root of 42330440 is about 348.5118859532.

Adding to 42330440 its reverse (4403324), we get a palindrome (46733764).

The spelling of 42330440 in words is "forty-two million, three hundred thirty thousand, four hundred forty".