42808686 has 16 divisors (see below), whose sum is σ = 90653904. Its totient is φ = 13430144.

The previous prime is 42808673. The next prime is 42808699. The reversal of 42808686 is 68680824.

It is an interprime number because it is at equal distance from previous prime (42808673) and next prime (42808699).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209745 + ... + 209948.

It is an arithmetic number, because the mean of its divisors is an integer number (5665869).

Almost surely, 2^42808686 is an apocalyptic number.

42808686 is an abundant number, since it is smaller than the sum of its proper divisors (47845218).

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

42808686 is a wasteful number, since it uses less digits than its factorization.

42808686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419715.

The product of its (nonzero) digits is 147456, while the sum is 42.

The square root of 42808686 is about 6542.8347067613. The cubic root of 42808686 is about 349.8194606305.

The spelling of 42808686 in words is "forty-two million, eight hundred eight thousand, six hundred eighty-six".