42440506 has 8 divisors (see below), whose sum is σ = 64704564. Its totient is φ = 20872320.

The previous prime is 42440423. The next prime is 42440537. The reversal of 42440506 is 60504424.

It can be written as a sum of positive squares in 2 ways, for example, as 34117281 + 8323225 = 5841^2 + 2885^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173815 + ... + 174058.

Almost surely, 2^42440506 is an apocalyptic number.

42440506 is a deficient number, since it is larger than the sum of its proper divisors (22264058).

42440506 is a wasteful number, since it uses less digits than its factorization.

42440506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347936.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 42440506 is about 6514.6378256968. The cubic root of 42440506 is about 348.8136869769.

The spelling of 42440506 in words is "forty-two million, four hundred forty thousand, five hundred six".