42444809 has 8 divisors (see below), whose sum is σ = 47555328. Its totient is φ = 37542960.

The previous prime is 42444791. The next prime is 42444811. The reversal of 42444809 is 90844424.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42444809 is a prime.

It is a super-2 number, since 2×42444809² = 3603123622092962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42444839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51737 + ... + 52550.

It is an arithmetic number, because the mean of its divisors is an integer number (5944416).

Almost surely, 2^42444809 is an apocalyptic number.

It is an amenable number.

42444809 is a deficient number, since it is larger than the sum of its proper divisors (5110519).

42444809 is a wasteful number, since it uses less digits than its factorization.

42444809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104335.

The product of its (nonzero) digits is 36864, while the sum is 35.

The square root of 42444809 is about 6514.9680735979. The cubic root of 42444809 is about 348.8254752009.

The spelling of 42444809 in words is "forty-two million, four hundred forty-four thousand, eight hundred nine".