42809574 has 64 divisors (see below), whose sum is σ = 92897280. Its totient is φ = 13126560.

The previous prime is 42809573. The next prime is 42809593. The reversal of 42809574 is 47590824.

42809574 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×42809574² = 3665319252122952, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42809573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 515737 + ... + 515819.

It is an arithmetic number, because the mean of its divisors is an integer number (1451520).

Almost surely, 2^42809574 is an apocalyptic number.

42809574 is an abundant number, since it is smaller than the sum of its proper divisors (50087706).

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

42809574 is a wasteful number, since it uses less digits than its factorization.

42809574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 42809574 is about 6542.9025669041. The cubic root of 42809574 is about 349.8218794350.

The spelling of 42809574 in words is "forty-two million, eight hundred nine thousand, five hundred seventy-four".