42657678 has 48 divisors (see below), whose sum is σ = 109549440. Its totient is φ = 12186936.

The previous prime is 42657673. The next prime is 42657689. The reversal of 42657678 is 87675624.

42657678 is a `hidden beast` number, since 4 + 2 + 6 + 576 + 78 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42657673) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2868 + ... + 9671.

It is an arithmetic number, because the mean of its divisors is an integer number (2282280).

Almost surely, 2^42657678 is an apocalyptic number.

42657678 is an abundant number, since it is smaller than the sum of its proper divisors (66891762).

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

42657678 is a wasteful number, since it uses less digits than its factorization.

42657678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12563 (or 12551 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The square root of 42657678 is about 6531.2845597172. The cubic root of 42657678 is about 349.4076456599.

The spelling of 42657678 in words is "forty-two million, six hundred fifty-seven thousand, six hundred seventy-eight".