42809558 has 12 divisors (see below), whose sum is σ = 70583100. Its totient is φ = 19458780.

The previous prime is 42809551. The next prime is 42809561. The reversal of 42809558 is 85590824.

42809558 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42809551) 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 5 ways as a sum of consecutive naturals, for example, 88208 + ... + 88691.

It is an arithmetic number, because the mean of its divisors is an integer number (5881925).

Almost surely, 2^42809558 is an apocalyptic number.

42809558 is a deficient number, since it is larger than the sum of its proper divisors (27773542).

42809558 is a wasteful number, since it uses less digits than its factorization.

42809558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176923 (or 176912 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 41.

The square root of 42809558 is about 6542.9013442050. The cubic root of 42809558 is about 349.8218358532.

The spelling of 42809558 in words is "forty-two million, eight hundred nine thousand, five hundred fifty-eight".