42680646 has 12 divisors (see below), whose sum is σ = 92474772. Its totient is φ = 14226876.

The previous prime is 42680629. The next prime is 42680683. The reversal of 42680646 is 64608624.

It is a happy number.

42680646 is a `hidden beast` number, since 4 + 2 + 6 + 8 + 0 + 646 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42680646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1185556 + ... + 1185591.

It is an arithmetic number, because the mean of its divisors is an integer number (7706231).

Almost surely, 2^42680646 is an apocalyptic number.

42680646 is an abundant number, since it is smaller than the sum of its proper divisors (49794126).

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

42680646 is a wasteful number, since it uses less digits than its factorization.

42680646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2371155 (or 2371152 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 42680646 is about 6533.0426295869. The cubic root of 42680646 is about 349.4703444540.

The spelling of 42680646 in words is "forty-two million, six hundred eighty thousand, six hundred forty-six".