42358809 has 8 divisors (see below), whose sum is σ = 59451040. Its totient is φ = 26752896.

The previous prime is 42358793. The next prime is 42358831. The reversal of 42358809 is 90885324.

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 42358809 - 2⁴ = 42358793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42358889) 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, 371512 + ... + 371625.

It is an arithmetic number, because the mean of its divisors is an integer number (7431380).

Almost surely, 2^42358809 is an apocalyptic number.

It is an amenable number.

42358809 is a deficient number, since it is larger than the sum of its proper divisors (17092231).

42358809 is a wasteful number, since it uses less digits than its factorization.

42358809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743159.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 42358809 is about 6508.3645411117. The cubic root of 42358809 is about 348.5897237601.

The spelling of 42358809 in words is "forty-two million, three hundred fifty-eight thousand, eight hundred nine".