42240444 has 24 divisors (see below), whose sum is σ = 104359248. Its totient is φ = 13251840.

The previous prime is 42240433. The next prime is 42240463. The reversal of 42240444 is 44404224.

It is a congruent number.

It is an unprimeable number.

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, 103327 + ... + 103734.

It is an arithmetic number, because the mean of its divisors is an integer number (4348302).

Almost surely, 2^42240444 is an apocalyptic number.

It is an amenable number.

42240444 is an abundant number, since it is smaller than the sum of its proper divisors (62118804).

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

42240444 is a wasteful number, since it uses less digits than its factorization.

42240444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207085 (or 207083 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 24.

The square root of 42240444 is about 6499.2648815078. The cubic root of 42240444 is about 348.2647278841.

Adding to 42240444 its reverse (44404224), we get a palindrome (86644668).

The spelling of 42240444 in words is "forty-two million, two hundred forty thousand, four hundred forty-four".