42440447 has 8 divisors (see below), whose sum is σ = 48544800. Its totient is φ = 36346464.

The previous prime is 42440423. The next prime is 42440537. The reversal of 42440447 is 74404424.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42440447 - 2⁸ = 42440191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42448447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10829 + ... + 14217.

It is an arithmetic number, because the mean of its divisors is an integer number (6068100).

Almost surely, 2^42440447 is an apocalyptic number.

42440447 is a deficient number, since it is larger than the sum of its proper divisors (6104353).

42440447 is a wasteful number, since it uses less digits than its factorization.

42440447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5185.

The product of its (nonzero) digits is 14336, while the sum is 29.

The square root of 42440447 is about 6514.6332974313. The cubic root of 42440447 is about 348.8135253388.

The spelling of 42440447 in words is "forty-two million, four hundred forty thousand, four hundred forty-seven".